Question

which element has six valence electrons? (1 point) o phosphorus (p) o oxygen (o) o lead (pb) o carbon (c)

Explanation:

Step1: Recall valence - electron rules for main - group elements

For main - group elements, the number of valence electrons is equal to the group number (for groups 1 - 2 and 13 - 18).

Step2: Determine group numbers of given elements

Phosphorus (P) is in group 15, so it has 5 valence electrons. Oxygen (O) is in group 16, so it has 6 valence electrons. Lead (Pb) is in group 14, so it has 4 valence electrons. Carbon (C) is in group 14, so it has 4 valence electrons.

Answer:

Oxygen (O)