Question
Calculate magnetic moment of thorium $(Z=90)$. Is this element diamagnetic or paramagnetic?
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Answer
The electronic configuration of thorium is $[Rn] 5f^0 6d^2 7s^2$.
the condensed electronic configuration for its divalent cation will be
There are $2$ unpaired electrons, so $n = 2$.
$\therefore \mu=\sqrt{2(2+2)}=\sqrt{8} BM =2.83\ BM$
Spin only magnetic moment of the given ion is $2.83\ BM$. This element contains two unpaired electrons and hence, it is paramagnetic.
the condensed electronic configuration for its divalent cation will be
There are $2$ unpaired electrons, so $n = 2$.
$\therefore \mu=\sqrt{2(2+2)}=\sqrt{8} BM =2.83\ BM$
Spin only magnetic moment of the given ion is $2.83\ BM$. This element contains two unpaired electrons and hence, it is paramagnetic.
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