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15-05-2019
Chemistry

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PLEASE HELP ME WITH THIS!!! Due in 20 minutes

PLEASE HELP ME WITH THIS Due in 20 minutes class=

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15-05-2019

4. Elements in the same group on the periodic table have the same number of valence electrons.

5. Properties of elements within a period on the periodic table change in a predictable way from one side of the table to the other.

6. The number of protons in an atom determines the identity of the element.

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