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Gelneren [198K]
3 years ago
5

Which element has seven energy levels the only one valence electron

Biology
1 answer:
denpristay [2]3 years ago
5 0

Answer:

Your answer is chlorine.

Explanation:

Valence electrons help in predicting chemical reactions. For example, since hydrogen (H) is in group 1, it has 1 electron in its outer energy level. Chlorine (Cl), which is in group 17, has 7 electrons in its outer energy level and is one electron short of having a "full" outermost energy level.

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