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1. $F e^{2 +}$

A. $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6}$
B. $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6}$
C. $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6}$
D. $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6}$

Answer: Option B

Explanation:

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