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 group number and period of the chomium is the periodic table atom is
A. 6 and 3
B. 5 and 3
C. 6 and 4
D. 5 and 4