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

`Kr (Z = 36)`

Explanation

`._(36)Kr = 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(10) 4s^(2) 4p^(6)`. S electrons = 8, p electrons = 18, d electrons = 10