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Magnetic moment
Appears in
Concepts tested here
- Spin-only formula 2
All Questions
2015 AIPMT-I 1 question
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Magnetic moment 2.84 B.M. is given by: (At. nos. Ni = 28, Ti = 22, Cr = 24, Co = 27)$\mu = \sqrt{n(n+2)}$ B.M.
$2.84 = \sqrt{n(n+2)} \Rightarrow n^2 + 2n - 8.07 = 0 \Rightarrow n \approx 2$
$Ni^{2+}$: $[Ar]3d^84s^0$ has 2 unpaired electrons.
($Ti^{3+}$ has 1, $Cr^{2+}$ has 4 and $Co^{2+}$ has 3 unpaired electrons.)
2014 AIPMT 1 question
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Magnetic moment 2.83 BM is given by which of the following ions? (At. nos. Ti = 22, Cr = 24, Mn = 25, Ni = 28):$\mu = \sqrt{n(n+2)} = 2.83$ BM gives n = 2.
$Ni^{2+}$ ($3d^8$) has two unpaired electrons.