(a) Interpretation: The characteristic that was used to organize elements in periodic table should be determined. Concept introduction: The element is simplest unit from matter that can’t be furthermore broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Question

v. Answer true or false. (a) Mendeleev discovered that, when elements are arranged in order of increasing atomic weight, certain sets of properties recur periodically. (b) Main-group elements are those in the columns 3A to 8A of the Periodic Table. (e) Nonmetals are found at the top of the Periodic Table, metalloids in the middle, and metals at the bottom. (d) Among the 116 known elements, there are approximately equal numbers of metals and nonmetals. (e) A horizontal row in the Periodic Table is called a group. () The Group 1A elements are called the "alkali metals." (g) The alkali metals react with water to give hydrogen gas and a metal hydroxide, MOH, where “M" is the metal. (h) The halogens are Group 7A elements. (1) The boiling points of noble gases (Group 8A elements) increase in going from top to bottom of the column.

Answer 1

Question

Chapter 2, Problem 2.55SP

Interpretation Introduction

(a)

Interpretation:

The characteristic that was used to organize elements in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be furthermore broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(b)

Interpretation:

The name of horizontal row in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(c)

Interpretation:

The name of vertical column in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

d)

Interpretation Introduction

Interpretation:

The name of groups from 1A-8A in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(e)

Interpretation:

The name of groups from 1B-8B in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(f)

Interpretation:

The classification of three elements Mo, Br, and Si into metal, semimetal, and nonmetal should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(e)

Interpretation:

The symbol of element located in 3^rd period and group 4A in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

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Students have asked these similar questions

v. Answer true or false. (a) Mendeleev discovered that, when elements are arranged in order of increasing atomic weight, certain sets of properties recur periodically. (b) Main-group elements are those in the columns 3A to 8A of the Periodic Table. (e) Nonmetals are found at the top of the Periodic Table, metalloids in the middle, and metals at the bottom. (d) Among the 116 known elements, there are approximately equal numbers of metals and nonmetals. (e) A horizontal row in the Periodic Table is called a group. () The Group 1A elements are called the "alkali metals." (g) The alkali metals react with water to give hydrogen gas and a metal hydroxide, MOH, where “M" is the metal. (h) The halogens are Group 7A elements. (1) The boiling points of noble gases (Group 8A elements) increase in going from top to bottom of the column.

(a) How many elements are found in period 4 in the periodic table? (b) How many elements are found in group 4A (or 14)?

Fill in the blanks: (a) The symbol and atomic number of the heaviest alkaline earth metal are ______ and ______. (b) The symbol and atomic number of the lightest metalloid in Group 4A(14) are ______ and ______. (c) Group 1B(11) consists of the coinage metals. The symbol and atomic mass of the coinage metal whose atoms have the fewest electrons are ______ and ______. (d) The symbol and atomic mass of the halogen in Period 4 are ______ and ______.

Answer 2

Question

Chapter 2, Problem 2.55SP

Interpretation Introduction

(a)

Interpretation:

The characteristic that was used to organize elements in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be furthermore broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(b)

Interpretation:

The name of horizontal row in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(c)

Interpretation:

The name of vertical column in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

d)

Interpretation Introduction

Interpretation:

The name of groups from 1A-8A in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(e)

Interpretation:

The name of groups from 1B-8B in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(f)

Interpretation:

The classification of three elements Mo, Br, and Si into metal, semimetal, and nonmetal should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(e)

Interpretation:

The symbol of element located in 3^rd period and group 4A in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

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Answer 3

Question

Chapter 2, Problem 2.55SP

Interpretation Introduction

(a)

Interpretation:

The characteristic that was used to organize elements in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be furthermore broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(b)

Interpretation:

The name of horizontal row in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(c)

Interpretation:

The name of vertical column in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

d)

Interpretation Introduction

Interpretation:

The name of groups from 1A-8A in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(e)

Interpretation:

The name of groups from 1B-8B in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(f)

Interpretation:

The classification of three elements Mo, Br, and Si into metal, semimetal, and nonmetal should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(e)

Interpretation:

The symbol of element located in 3^rd period and group 4A in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

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Answer 4

Question

Chapter 2, Problem 2.55SP

Interpretation Introduction

(a)

Interpretation:

The characteristic that was used to organize elements in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be furthermore broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(b)

Interpretation:

The name of horizontal row in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(c)

Interpretation:

The name of vertical column in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

d)

Interpretation Introduction

Interpretation:

The name of groups from 1A-8A in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(e)

Interpretation:

The name of groups from 1B-8B in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(f)

Interpretation:

The classification of three elements Mo, Br, and Si into metal, semimetal, and nonmetal should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(e)

Interpretation:

The symbol of element located in 3^rd period and group 4A in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

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Answer 5

Chapter 2, Problem 2.55SP

Interpretation Introduction

(a)

Interpretation:

The characteristic that was used to organize elements in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be furthermore broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(b)

Interpretation:

The name of horizontal row in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(c)

Interpretation:

The name of vertical column in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

d)

Interpretation Introduction

Interpretation:

The name of groups from 1A-8A in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(e)

Interpretation:

The name of groups from 1B-8B in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(f)

Interpretation:

The classification of three elements Mo, Br, and Si into metal, semimetal, and nonmetal should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Interpretation Introduction

(e)

Interpretation:

The symbol of element located in 3^rd period and group 4A in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Answer 6

Chapter 2, Problem 2.55SP

Interpretation Introduction

(a)

Interpretation:

The characteristic that was used to organize elements in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be furthermore broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Answer 7

Chapter 2, Problem 2.55SP

Interpretation Introduction

(a)

Interpretation:

The characteristic that was used to organize elements in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be furthermore broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Answer 8

Interpretation Introduction

(b)

Interpretation:

The name of horizontal row in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Answer 9

Interpretation Introduction

(b)

Interpretation:

The name of horizontal row in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Answer 10

Interpretation Introduction

(c)

Interpretation:

The name of vertical column in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Answer 11

Interpretation Introduction

(c)

Interpretation:

The name of vertical column in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Answer 12

d)

Interpretation Introduction

Interpretation:

The name of groups from 1A-8A in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Answer 13

d)

Interpretation Introduction

Interpretation:

The name of groups from 1A-8A in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Answer 14

Interpretation Introduction

(e)

Interpretation:

The name of groups from 1B-8B in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Answer 15

Interpretation Introduction

(e)

Interpretation:

The name of groups from 1B-8B in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Answer 16

Interpretation Introduction

(f)

Interpretation:

The classification of three elements Mo, Br, and Si into metal, semimetal, and nonmetal should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Answer 17

Interpretation Introduction

(f)

Interpretation:

The classification of three elements Mo, Br, and Si into metal, semimetal, and nonmetal should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Answer 18

Interpretation Introduction

(e)

Interpretation:

The symbol of element located in 3^rd period and group 4A in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Answer 19

Interpretation Introduction

(e)

Interpretation:

The symbol of element located in 3^rd period and group 4A in periodic table should be determined.

Concept introduction:

The element is simplest unit from matter that can’t be further more broken. The examples of elements are hydrogen, carbon, and oxygen. The elements of each group in periodic table are arranged in a way so that all the elements within group have same chemical valency. Due to this, these elements of same group show similar chemical properties. For example group 1A, known as alkali metals, all elements present in this group are soft and silvery metal. They all react violently with water.

Answer 20

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Answer 21

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Answer 22

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Answer 23

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Answer 24

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Answer 25

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Answer 26

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Answer 27

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Answer 28

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Answer 29

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Answer 30

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Answer 31

Ch. 2 - An element is a shiny, silver-colored solid at...Ch. 2 - Prob. 2.2A Ch. 2 - PRACTICE 2.3Compounds A and B are colorless gases...Ch. 2 - APPLY 2.4If the chemical formula of compound A in...Ch. 2 - PRACTICE 2.5The gold foil that Rutherford used in...Ch. 2 - Prob. 2.6A Ch. 2 - PRACTICE 2.7The isotope 3475Se is used medically...Ch. 2 - APPLY 2.8Element X is toxic to humans in high...Ch. 2 - PRACTICE 2.9Copper metal has two naturally occur-...Ch. 2 - Prob. 2.10A

Solution Summary: The author explains that the element is simplest unit from matter that can’t be furthermore broken. Periodic table represents a systematic arrangement of elements according to their chemical and physical properties.

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Chapter 2 Solutions