Give the name and atomic number of the inert gas atom in which the total number of `d`-electrons is equal to the difference in number to the `p`-and `-s`-electrons.

Answer

36

Explanation

First gas which contains d-electron is Kr.
`1s^2 2s^2 2p^2 3s^2 3p^6 3d^10 4s^2 4p^6`
Total number of d-electrons=10
Total number of p-electrons=6+6+6=18
Total number of s-electrons =2+2+2+2=8
Difference in total number of p- and s- electrons=18-8=10
So inert gas is `._36 Kr`.