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Metallic properties include luster, malleability, and electrical conductivity.
Patterns in Properties of Metals
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?
More than 96 percent of the mass of the human body comes from four nonmetals–oxygen, carbon, hydrogen, and nitrogen.
The Elements of Life
• Where are nonmetals and metalloids on the periodic table?
• What are the properties of nonmetals and metalloids?
Nonmetals and Metalloids
HALOGENS
• Found only as compounds in nature not as free elements• React with metals and nonmetals
1 2
3 4 5 6 7 8 9 10 11 12
13 14 15 16 17
18
NOBLE GASES
• Do not form compounds• React with other elements in the lab
1 2
3 4 5 6 7 8 9 10 11 12
13 14 15 16 17
18
How are nonmetals different from metals? (cont.)
What properties do nonmetals have?
Between the metals and the nonmetals on the periodic table.
1 2
3 4 5 6 7 8 9 10 11 12
13 14 15 16 17
18
