The answer is D The electrons are found on three shells (hence period 3) and on the third shell there are (2 + 3) electrons hence group 5A. Also, the element is Phosphorous (P)
Period 3, Group 5A or P... use your periodic table to count. When I first learned this I colored the S group the P group, D and F groups different colors.
Group 1 A and Group 2 A are S.
Groups 3A to 8A are P.
The B's or transition metals are D
And the lanthanide series and actinide series are F.
Then count left to right.
