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Electron Gain Enthalpy

Which of the ...

Question

Which of the following will have maximum electron affinity?

1 s^{2} 2 s^{2} 2 p^{5}

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1 s^{2} 2 s^{2} 2 p^{6}

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1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{5}

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1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6}

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Solution

The correct option is C $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{5}$
$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{5}$ is the electron afinity of chlorine

In $C l$ , there are empty d-orbitals where it can accommodate its electron and because of this, attraction forces increases and electron affinity also. So, $C l$ has the highest electron affinity.

Hence, the correct option is $C$

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D

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