Question

The atomic number of chromium is `24` Its electronic coefigueration in ground state in `1s^(2) 2s^(2)2p^(6)3s^(2)4s^(1) 3d^(5)` .Chromium atom by using `3` electron from `Cr ^(2+)` .A chromium atom contain `17%` morte neutron than the proton. Now answer the following questions
The number of electron having `n = 3` and `m_(1) = 0` in chromium atom is
A. 2
B. 5
C. 4
D. 1

Answer 1

Correct Answer - B
`2` electrons in `3s,2` electron in `3p` and `1` electron in `3d` have `m_(1) = 0`