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a row of elements in the Periodic Table
Period
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a column (or family) of elements in the Periodic Table
Group
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These elements are in groups 1 and 2, and 13-18 of the Periodic Table.
Representative Elements
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the elements in groups 3-12 (middle section) of the Periodic Table
Transition Elements
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an element that has luster, is a good conductor of heat and electricity, is malleable, and is ductile
Metal
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these are either gases or brittle solids at room temperature, and are poor conductors of heat and electricity
Nonmetal
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These are elements that share some properties with metals, and some with nonmetals.
Metalloids
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This is a family name for the elements in Group 1 of the Periodic Table.
Alkali Metals
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This is the family name for the elements in Group 2 of the Periodic Table.
Alkaline Earth Metals
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These are elements that do not conduct electricity as well as metals, but do conduct better than nonmetals.
Semiconductors
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This is the family name for the elements in Group 17 of the Periodic Table. This name means “salt-former.”
Halogens
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This is the family name for the elements in Group 18 of the Periodic Table.
Noble Gases
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