Disscuss why technetium and promethium have whole number atomic masses and have a bracket symbol on the periodic table.

Q: Where is the lithium located in the periodic table and why is it located where it is

A: Lithium is located in the 2nd row and 1st group in the periodic table.

Q: ionization energy

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Q: A representative element (Z) forms an ion with a 2+ charge.  What is the  a)  Roman Numeral group…

A: Oxidation state or oxidation number is the number of electrons that are either gained or lose by an…

Q: Sara suggests that when electrons change in number within atoms, an ion is formed. Therefore, if the…

A: Ions are formed by addition or removal of electrons from the given atom, if the ion carries positive…

Q: Can ions of different elements have the same number of protons?

A: There are 3 subatomic particles which are electrons, protons and neutrons. The positively charged…

Q: A particular atom has the symbol: 25Ne2- This atom has: protons - ? neurons - ?  electrons- ?…

A: The symbol is given as, 25Ne2- First of all, this is not an atom. This is an ion, an anion.  The…

Q: An atom of sulfur has 6 electrons in the third, outer shell. What is the maximum number of electrons…

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Q: Some sports bottles are made of Lexan, aplastic containing a compound of the elements…

A: Some sports bottles are made of Lexan, a plastic containing a compound of the elements chlorine,…

Q: Which group(s) in the periodic table contain only nonmetals?

A: The group in the periodic table contain only nonmetals has to be given,

Q: Compare the-chemical reactivity of calcium and magnesium. Explain the red litmus paper result. Can…

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Q: Why do you think changing N does not change the element, but changing Z does?

A: N stands for the number of neutrons and Z stand for the number of protons.

Q: how to write ionic formulas with transition metals? Provide with example.

A: Transition metals are d-block elements placed between s-block and p-block elements in the periodic…

Q: up element with the valence electron configuration 3s' is in periodic group atomic ion with a charge…

A: A) As last electrons goes to p subshell. Then it is p block element. Element is in periodic group…

Q: Which group of the periodic table is known as the alkalimetals? List their symbols.

A: The periodic table gives the arrangement of elements in the order of increasing atomic numbers. It…

Q: The predicted charge for O is (+ and signs are required): This mean: that O (gained or lost, and how…

A: Electronic configuration of O : 1s2 2s2 2p4

Q: Predict the charge of the ion formed by  element and write the electron configuration of the ion. Al

A: To determine: The electronic configuration of most stable ion of aluminum (Al)

Q: Most elements are classified as _______ and can be found in the lower-left and middle portions of…

A: Periodic table is the tabular arrangement of elements in certain rows(periods) and columns(groups).…

Q: What class of elements lies along the “staircase” line in theperiodic table? How do their properties…

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Q: family of elements in the periodic table and how are they differentiated/ distinct from each other?

A: The terms element family and element group are used to describe sets of elements sharing common…

Q: Tennessine, element 117, is the most recently discovered element in the periodic table. Assuming it…

A: It is given that Tennessine is an element having an atomic number of 117 and is the recently…

Q: Element Name Charge of the Atom Silver Strontium Samarium Silicon

A: This question is related to charges on atoms.

Q: Which of the following applies to the electron?

A: A atom consists of protons , neutrons and electrons.prptons and neutrons are existing in nucleus.…

Q: element X is in group 15 on the periodic table. it would form an ion with a what charge

A: Element ionic charge depends on the group of an element to which it belongs.

Q: Why does the fourth period in the periodic table contain 18 elements?

A: The periodic table is the tabular arrangement of elements which are arranged in the increasing order…

Q: Elements that lie on the left side of the periodic table are generally non-metals?

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Q: Main group elements that are metals usually ________ one or more electrons to form ________, which…

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Q: Which of the following characteristics DOES NOT DESCRIBE atoms on the top right of the periodic…

A: ans: D Bigger ,more rings 1 or 2 valence electrons REASON: In periodic table from left to right…

Q: (a) Would you expect scandium oxide to be a solid, liquid, or gas at room temperature?

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Q: draw a shell model of a lithium atom which has three protons then predict wether the majority of…

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Q: Use the periodic table to determine  quantity. the number of 4d electrons in Y

A: Y has a electron configuration of [Kr]5s24d1

Q: Write the complete electron configuration of molybdenum in the box below. rhitals For examr

A: The element given is molybdenum.

Q: Cruie the corred lemia Symbols for the 2nd period elements A CLIVE EXPLAINED HANDWRITTEN ANSWER

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Q: Whal are the Four guantum num bers

A: Quantum numbers describe the energy and position of electron in an atom. Four quantum numbers are…

Q: Consider the following elements: chromium, tungsten, yttrium, vanadium, indium Which one does not…

A: The periodic table of elements consists of different blocks namely s, p, d, and f.  s-block -…

Q: Elements of a group in the periodic table

A: The periodic table is the arrangement of chemical elements according to their atomic number. These…

Q: 1. There are three particles (A, B, C) in a linear arrangement:  A---B---C. Calculate the…

A: As there are multiple questions, we will solve the first one for you. For the rest to be solved,…

Q: Isnt boron just b on the periodic table?

A: The formula of diboron trioxide is determined as shown below,

Q: element belonging to 18the group are called zero group element. why?

A: The elements belong to group 18 have completely filled valence shell. That means, they have 8…

Q: Halogens elements are in group?

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Q: Draw the trend for decreasing metallic property in periodic table of elements

A: Explain the periodic property of the metallic nature of elements.

Q: Horizontal rows in the periodic table are referred to by what two terms?

A: Periodic table is a systematic arrangement of chemical elements on the basis of their electronic…

Q: What is the predicted Ionic charge for a Ba ion? How am I supposed to identify this???   Similarly,…

A: The term ionic charge refers to the electric charge carried by an ion by gaining or losing electrons…

Q: Why does ionization energy in crease across a period? a greater number of electrons? b. Greater…

A: The energy that is basically needed to displace an electron (e-) from an atom which is isolates and…

Q: By definition, atoms are electrically neutral. Is it possible for atoms of two different elements to…

A: Atoms are electrically neutral, because in the ground state, number of protons and number of…

Q: a) Calculate the number of electrons for each ion. b) Identify the ions that are in the…

A: Given ions: Cl-, N3-, Rb+, S2-, Br-, Sn4+

Q: Is gold metal nonmetal or metalloid

A: Gold is a transition metal belonging to Cu and Ag group.

Q: The predicted charge for Sr is (+ and - signs are required): This means that Sr (gained or lost, and…

A: The strontium is a group 2 element and hence the valence electronic configuration is ns2. Inorder to…