unit 1 lesson 17ppt
TRANSCRIPT
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Metallic properties include luster, malleability, and electrical conductivity.
Patterns in Properties of Metals
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Alkali metals are highly reactive metals. They react
quickly with other elements, such as oxygen. So, in
nature, they are found only in compounds.
ex: NaCl
Why are the elements in group 1, the alkali metals,
found only in compounds in nature?
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More than 96 percent of the mass of the human body comes from four nonmetals–oxygen, carbon, hydrogen, and nitrogen.
The Elements of Life
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• Where are nonmetals and metalloids on the periodic table?
• What are the properties of nonmetals and metalloids?
Nonmetals and Metalloids
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HALOGENS
• Found only as compounds in nature not as free elements• React with metals and nonmetals
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NOBLE GASES
• Do not form compounds• React with other elements in the lab
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How are nonmetals different from metals? (cont.)
What properties do nonmetals have?
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Between the metals and the nonmetals on the periodic table.
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