The number of d-electrons in Fe^ 2+ (Z=26) is not equal to the number of electrons in which one of the following?

MHT CET Chemistry question

The number of d-electrons in () is not equal to the number of electrons in which one of the following?

Answer: (B)

is , so it has 6 d-electrons. Mg () has 6 s-electrons, Fe has 6 d-electrons and Ne

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Question ID VK-060545