Use Hund’s rule to derive the electronic ...

NCERT Class XII Chemistry
Chapter - The d- and f-Block Elements
Questions with Solutions

Question : 31 of 49

Marks: +1, -0

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.

Solution:

The electronic configuration of Ce

^{3+}

is 4f

^{1}

\mu=\sqrt{n(n+2)}

=\sqrt{1(1+2)}

=\sqrt{3}

=1.732 \text{ BM}

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