joThompson
21.09.2019 •
Chemistry
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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Ответ:
It is in the halogens group.
It needs 1 more electron to become stable, therefore, it is highly reactive.
Ответ:
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Explanation: