Which of the following is the electron configuration of $Fe^{2+}$ ion? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a $[Ar]3d^6$ b $[Ar]3d^8$ c $[Kr]3d^74s^2$ d $[Kr]3d^5$
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The atomic number of Fe is 26. The electron configuration of Fe is $1s^22s^22p^63s^23p^64s^23d^6$. We can also write it as $[Ar]4s^23d^6$. Show more…
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Which one of the following is the correct configuration of $\mathrm{Fe}^{3+}(Z=26) ? \quad$ [S.C.R.A. 2001] (a) $[\mathrm{Ar}] 4 s^{2}, 3 d^{6}$ (b) $[\operatorname{Ar}] 4 s^{2}, 3 d^{3}$ (c) $[\mathrm{Ar}] 3 d^{5}$ (d) $[\operatorname{Ar}] 4 s^{2}, 3 d^{4}$
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