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25-07-2021
Physics

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Which of the elements below have seven electrons in their outermost energy levels? A.) Cr, Mn, and Fe B.) Br, I, and Ci C.) O, S, and Se D.) He, Ne, and Ar

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Аноним Аноним

25-07-2021

Answer:

B

Explanation:

the Halogen families have 7 valence electrons

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