Question

For an element, the spin only magnetic moment is 4.90



b.M. Hence the number of unpaired electrons in the valence shell of this element is (are)

Answer 1

Answer:

4 unpaired electrons in Valence shall

Answer 2

The number of unpaired electrons in the valence shell of this element is 4.

Explanation:

Formula used for spin only magnetic moment :

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

where,

$\mu$ = spin only magnetic moment

n = number of unpaired electrons

Now put all the given values in the above formula, we get the unpaired electrons.

$\sqrt{n(n+2)}=4.90BM$

$n(n+2)=24.01$

$n=4$

Therefore, the number of unpaired electrons is 4.

Thus the element must have 4 unpaired electrons in the valence shell.

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