Question

Which element gains three electrons to fill its outermost energy level?

(1 point)
Responses

boron (B)
boron (B)

phosphorus (P)
phosphorus (P)

selenium (Se)
selenium (Se)

magnesium (Mg)
magnesium (Mg)

Answer 1

The element that gains three electrons to fill its outermost energy level is **phosphorus (P)**. Phosphorus has five valence electrons and needs three more to complete its outermost shell (the octet).

So, the correct response is phosphorus (P).