Why is the electron affinity slightly positive for some of the group 2 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 2 elements are diatomic elements.
E)Electrons can't be added to metals.

Question

Quizplus · Accepted Answer

The added electron in group 2 elements would have to enter the p subshell, which is higher in energy than the filled s subshell, making the process less favorable and resulting in a slightly positive electron affinity.

Why Is the Electron Affinity Slightly Positive for Some of the Group