Question

If hund rule is followed magnetic moment of Fe+2 Mn+ and Cr having 24 electron will be in order

Answer 1

Explanation:

magnetic moment=√n(n+2)

Answer 2

Magnetic moment will follow the order $Mn^{+}$ = $Cr$ > $Fe^{2+}$

Explanation:

Formula used for spin only magnetic moment :

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

where,

$\mu$ = spin only magnetic moment

n = number of unpaired electrons

a) $Fe^{2+}:24:1s^22s^22p^63s^23p^63d^6$ , there are 4 unpaired electron.

$\mu=\sqrt{4(4+2)}=4.90BM$

b) $Mn^{+}:24:1s^22s^22p^63s^23p^64s^13d^5$ , there are 6 unpaired electron.

$\mu=\sqrt{6(6+2)}=6.93BM$

c) $Cr:24:1s^22s^22p^63s^23p^64s^13d^5$ , there are 6 unpaired electrons.

$\mu=\sqrt{6(6+2)}=6.93BM$

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