An ion having a 4+ charge and a mass of 51.99 amu has two electrons with n=1,eight electrons with n=2,and ten electrons with n=3.Give the total number of protons present in the nucleus of the atom of metal.

Answer

24

Explanation

In `M^(4+)` ion total number of electrons =20
Electronic configuration `=(1s^2)/2 (2s^2 2p^6)/8 (3s^2 3p^6 3d^2)/10`
Number of electrons in metal = number of protons =4+20=24