JEE MAIN - Chemistry (2020 - 5th September Morning Slot - No. 8)
The correct electronic configuration and spin-only
magnetic moment (BM) of Gd3+ (Z = 64), respectively, are :
magnetic moment (BM) of Gd3+ (Z = 64), respectively, are :
[Xe]5f7 and 8.9
[Xe]4f7 and 7.9
[Xe]5f7 and 7.9
[Xe]4f7 and 8.9
Explanation
Gd3+ (Z = 64) = [Xe] 4f7
Magnetic moment ($$\mu $$) = $$\sqrt {n\left( {n + 2} \right)} $$ B.M
= $$\sqrt {7\left( {7 + 2} \right)} $$
= 7.9 B.M
Magnetic moment ($$\mu $$) = $$\sqrt {n\left( {n + 2} \right)} $$ B.M
= $$\sqrt {7\left( {7 + 2} \right)} $$
= 7.9 B.M
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