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.

Explanation

The first inert gas which contains d- electrons is krypton. Its atomic number is 36 and its electronic configuration is `: 1s^(2) 2s^(2) p^(6) 3s ^(2) p^(6) 3 d^(10) 4 s^(2) 4p^(6)` ltbgt Total number of d- electrons = 10
Total number of - electrons = 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 .
Thus the inert gas is krypton.