Why is the electron affinity so positive for the group 12 elements?
A) The added electron would have to go into a new shell.
B) The added electron would have to be added into the half-filled p subshell.
C) The added electron would have to be added into the p subshell.
D) The groups 12 elements are diatomic elements.
E) Electrons can't be added to gases.

Question

Quizplus · Accepted Answer

The group 12 elements have a filled d subshell and an s subshell, so the next electron would have to be added to the p subshell, which is higher in energy and less favorable, resulting in a positive electron affinity.

Why Is the Electron Affinity So Positive for the Group