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Q.

The electronic configuration of ${Zn}^{2 +}$ ion is

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a

${Ar} 3 d^{8} 4 s^{2}$

b

${Ar} 3 d^{10}$

c

${Ar} 3 d^{9} 4 s^{1}$

d

${Ar} 3 d^{8} 4 s^{1} 4 p^{1}$

answer is B.

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Detailed Solution

Electron configuration of Zn is 1s²2s²2p⁶3s²3p⁶3d¹⁰4s².
Electron configuration of Zn²⁺ is 1s²2s²2p⁶3s²3p⁶3d¹⁰. i.e. {Ar}3d¹⁰

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The electronic configuration of Zn2+ ion is