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SAT Chemistry

Category - Multiple Choice

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Which of the following is the correct electron configuration for F^-?

1s²2s²2p⁵
1s²2s²2p⁶
1s²2s²2p⁴
1s²2s²2p³
1s²2s²2p⁶3s¹

Explanation

Answer: 1s²2s²2p⁶

F^-has one more electron than a standard fluorine atom. Likewise, the electron configuration is written with one extra electron. Thus, the correct electron configuration for F^-is 1s²2s²2p⁶.

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