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Which one of the following has the least magnetic moment? (a) Cu^2+ (b) Ni^2+ (c) Co^2+ (d) Fe^2+

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ago in Chemistry by (10.8k points)

Which one of the following has the least magnetic moment?

(a) Cu2+

(b) Ni2+

(c) Co2+

(d) Fe2+

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1 Answer

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ago by (10.5k points)

Correct option is (a) Cu2+

Since Cu2+ ions has only one unpaired electron so it has the least magnetic moment.

S.NO Ion Electronic configuration No. of unpaired electrons
a Cu2+ d9 1
b Ni2+ d8 2
c Co2+ d7 3
d Fe2+ d6 4
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