Matter and Energy Concepts

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Periodic Table

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A table of the chemical elements arranged in order of atomic number.

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Group/Family

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The name given to the vertical columns of elements on the Periodic Table.

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Period/Row

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The name given to the horizontal rows of elements on the Periodic Table.

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Reactivity

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The tendency of a substance to react with its surroundings or certain other substances.

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Alkali Metals

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Elements located in group/family 1 on the Periodic Table.

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Alkaline Earth Metals

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Elements located in group/family 2 on the Periodic Table.

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Transition Metals

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Elements located in groups/families 3-12 on the Periodic Table.

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Halogens

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Elements located in group/family 17 on the Periodic Table.

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Noble Gases

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Elements located in group/family 18 on the Periodic Table.

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Metals

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Elements located to the left of the stair-step (zig zag) line on the Periodic Table.