JEE PYQ: Coordination Compounds Question 10
Question 10 - 2021 (25 Feb Shift 2)
The spin only magnetic moment of a divalent ion in aqueous solution (atomic number 29) is ____ BM.
Show Answer
Answer: 1.73
Solution
Atomic number 29 is Cu. Cu$^{2+} \rightarrow [\text{Ar}]3d^9$. 1 unpaired electron. $\mu = \sqrt{n(n+2)} = \sqrt{3} = 1.73$ BM.