Which of the following configurations represe | vedclass

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(C) The second ionization energy is the energy required to remove the second electron from a unipositive ion. For option $(C)$,the configuration is $1

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$1s^2 2s^2 2p^6 3s^1$

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(C) The second ionization energy is the energy required to remove the second electron from a unipositive ion. For option $(C)$,the configuration is $1s^2 2s^2 2p^6 3s^1$ (Sodium,$Na$). After removing the first electron,it becomes $Na^+$,which has the stable noble gas configuration $1s^2 2s^2 2p^6$. Removing the second electron from this stable octet configuration requires a very high amount of energy compared to the others.

Which of the following configurations represents atoms of the elements having the highest second ionization energy?

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