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26 September, 15:30

An atom in the ground state has seven valence electrons. This atom could be an atom of which element?

A. fluorine

B. Sodium

C. Calcium

D. oxygen

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  1. 26 September, 18:34
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    The atom that has 7 valence electrons is A. fluorine.

    It is in the halogens group.

    It needs 1 more electron to become stable, therefore, it is highly reactive.
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