Question

For each atom in the table below, write down the subshell from which an electron would have to be removed to make a +1 cation, and the subshell to which an electron would have to be added to make a 1 anion. The first row has been completed for you. atom subshell from which electron removed to form +1 cation subshell to which electron added to form 1 anion

Answer 1

Sr : 5s²  so an electron can be removed from 5s but can not be added to any subshell due to no vacancy.

Zn: [Ar] 3d¹⁰4s² so an electron can be removed from 4s but can not be added to any subshell to make anion.