The electronic configuration 1s^2 2s^2 2p^6 3 | vedclass

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(B) The total number of electrons in the given configuration is $2 + 2 + 6 + 2 + 6 + 6 = 24$. $Fe$ has an atomic number of $26$. $Fe^{2+}$ is formed b

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$Fe^{2+}$

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(B) The total number of electrons in the given configuration is $2 + 2 + 6 + 2 + 6 + 6 = 24$. $Fe$ has an atomic number of $26$. $Fe^{2+}$ is formed by the loss of two electrons from the $4s$ orbital of $Fe$ $(1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^6)$. Thus,the electronic configuration of $Fe^{2+}$ is $1s^2 2s^2 2p^6 3s^2 3p^6 3d^6$.

The electronic configuration $1s^2 2s^2 2p^6 3s^2 3p^6 3d^6$ corresponds to:

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