Question

Magnetic moment of at.no. 24

Answer 1

Answer : The magnetic moment is, 4.89 BM

Solution :

The metal is, chromium (Cr) with atomic number 24.

The electronic configuration of Cr is, 1s^22s^22p^63s^23p^64s^13d^5

Now we have to calculate the magnetic moment of Cr^{2+}.

The electronic configuration of Cr^{2+} is, 1s^22s^22p^63s^23p^64s^13d^3

The number of unpaired electrons in Cr^{2+} = 4

Formula used for magnetic moment :

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

where,

\mu = magnetic moment

n = number of unpaired electrons

Now put all the given values in the above formula, we get the magnetic moment.

\mu=\sqrt{4(4+2)}=4.89BM

Therefore, the magnetic moment is, 4.89 BM