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7 October, 14:27

How many electrons are there in the outermost shells of fluorine (F) atoms?

A. 2

B. 7

C. 9

D. 19

+2
Answers (1)
  1. 7 October, 14:36
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    C. 9

    Explanation:

    There are 2 electrons in the first shell, and 7 in the second, for a total of 9.

    A flouride ion, on other hand, would have 8, since it fills that second shell with an extra electron (that's why it has a charge of - 1)
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