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Use Hund's rule to derive the electronic configuration of Ce^3+ ion and calculate its magnetic moment on the basis of 'spin-only' formula.

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Use Hund's rule to derive the electronic configuration of Ce3+ ion and calculate its magnetic moment on the basis of 'spin-only' formula.

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Ce: 1s22s22p63s23p63d104s24s24p64p64d105s25p64f15d16s2

Magnetic moment can be calculated as:

μ = \(\sqrt{n(n+2)}\)

Where,

n = number of unpaired electrons

The electronic configuration of

Ce3+: 1s22s22p63s23p63d104s24p64d105s25p64f1

In Ce3+, n = 1

∴ Ce3+ = 1(1 + 2).......

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