Which of the following is paramagnetic

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Question

(a) Elements or ions containing unpaired electrons are paramagnetic.

$_{28}Ni = [Ar]\;3{d^8}4s_2^{}$ ; $N{i^{2 + }} = [Ar]\;3{d^8}4{s^0}$

Becaus

Vedclass · Accepted Answer

$N{i^{ + 2 }}$

Vedclass · Answer

(a) Elements or ions containing unpaired electrons are paramagnetic.

$_{28}Ni = [Ar]\;3{d^8}4s_2^{}$ ; $N{i^{2 + }} = [Ar]\;3{d^8}4{s^0}$

Because $N{i^{2 + }}$ have $2$  unpaired electrons in $3d$  subshell therefore it is paramagnetic.

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