How many unpaired electrons are there in N i^ 2 + - Vidyadip

MCQ

How many unpaired electrons are there in $N{i^{2 + }}$

✓
$2$
B
$4$
C
$5$
D
$0$

✓

Answer

Correct option: A.

$2$

a
(a)$Ni \to 1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^8}4{s^2}$

$N{i^{2 + }} \to 1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^8}$

$3{d^8} = 10 - 2 = 2$ unpaired electron.

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