Activity 7: Classification of Elements Dividing elements into groups is not the only way to classify elements based on their chemical properties. Three classes of elements are metals, nonmetals, and metalloids. Across a period, the properties of elements become less metallic and more nonmetallic. Most elements of the periodic table are metals, roughly about 80%. The next category of elements, nonmetals, is located in the upper-right corner of the periodic table, except hydrogen. There is a greater variation in physical properties among nonmetals than among metals. In the periodic table, you may notice a heavy stair-step line that separates the metals from the nonmetals. Most of the elements that border this line are metalloids. A metalleid gonerally has motalc and

Activity 7: Classification of Elements Dividing elements into groups is not the only way to classify elements based on their chemical properties. Three classes of elements are metals, nonmetals, and metalloids. Across a period, the properties of elements become less metallic and more nonmetallic. Most elements of the periodic table are metals, roughly about 80%. The next category of elements, nonmetals, is located in the upper-right corner of the periodic table, except hydrogen. There is a greater variation in physical properties among nonmetals than among metals. In the periodic table, you may notice a heavy stair-step line that separates the metals from the nonmetals. Most of the elements that border this line are metalloids. A metalleid gonerally has motalc and

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter1: The Nature Of Chemistry

Section1.13: The Periodic Table

Problem 1.9E

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Similar questions

2.84 Early attempts to arrange the elements often focused on atomic weight. Mendeleev considered a number of properties in addition to atomic weight, so he realized that some elements seemed out of place when ordered by atomic weight. Using the modern periodic table, identify elements for which Mendeleev must have had to switch the order in order to get the correct sequence of elements.
How do binary compounds with hydrogen illustrate the concept of periodicity?
Given that the periodic table is an organizational scheme for the elements, what might be some other logical ways in which to group the elements that would provide meaningful chemical information in a periodic table of your own devising?
2-44 Which period(s) in the Periodic Table contain(s) more nonmetals than metals? Which contain(s) more metals than nonmetals?
2.42 What is a period in the periodic table? From what does it derive its name?
The symbols for most elements are based on the first few letters of the respective element’s common English name. In some cases, however, the symbol seems to have nothing to do with the element’s common name. Give three examples of elements whose symbols are not directly derived from the element’s common English name.