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Question: Answered & Verified by Expert
The magnetic moment of the ground state of an atom whose open sub shell is half filled with five electrons is
PhysicsMagnetic Effects of CurrentVITEEEVITEEE 2007
Options:
  • A $\sqrt{35} \sqrt{\mu_{\mathrm{B}}}$
  • B $35 \mu_{\mathrm{B}}$
  • C $35 \sqrt{\mu_{\mathrm{B}}}$
  • D $\mu_{\mathrm{B}} \sqrt{35}$
Solution:
2157 Upvotes Verified Answer
The correct answer is: $\mu_{\mathrm{B}} \sqrt{35}$
The magnetic moment of the ground state of an atom whose open sub-shell is half filled with $\mathrm{n}$ electrons is given by
$\mu=\sqrt{\mathrm{n}(\mathrm{n}+2)} \cdot \mu_{\mathrm{B}}$
where $\mu_{\mathrm{B}}$ is the gyromagnetic moment of the atom.
Here, $\mathrm{n}=5$
$\therefore \mu=\sqrt{5(5+2)} \cdot \mu_{\mathrm{B}}=\sqrt{35} \mu_{\mathrm{B}}$

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