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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 & Chemical Reactivity
Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter7: The Structure Of Atoms And Periodic Trends
Section: Chapter Questions
Problem 78SCQ
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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 metalloid generally has properties that are similar to those of metals and nonmetals. Under some conditions, a metalloid may behave like a metal. Under other conditions, it may behave like a nonmetal. For example, like most nonmetals, pure silicon is a poor conductor of electric current. However, if a small amount of boron is mixed with silicon, the mixture is a good conductor of electric current. Silicon can be cut into wafers and used to make computer chips. In the table below, describe the different classifications of elements. Be sure to include physical and chemical properties, especially the state of matter. Metals vs. Metalloids vs. Nonmetals Metals Metalloids Nonmetals
Transcribed Image Text: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 metalloid generally has properties that are similar to those of metals and nonmetals. Under some conditions, a metalloid may behave like a metal. Under other conditions, it may behave like a nonmetal. For example, like most nonmetals, pure silicon is a poor conductor of electric current. However, if a small amount of boron is mixed with silicon, the mixture is a good conductor of electric current. Silicon can be cut into wafers and used to make computer chips. In the table below, describe the different classifications of elements. Be sure to include physical and chemical properties, especially the state of matter. Metals vs. Metalloids vs. Nonmetals Metals Metalloids Nonmetals
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