Question

which group of the periodic table has 7 valence electrons?
alkaline earth metals
noble gases
halogens
alkali metals

Explanation:

Alkaline Earth Metals have 2 valence electrons. Noble Gases usually have 8 valence electrons (except helium which has 2). Halogens have 7 valence electrons. Alkali Metals have 1 valence electron.

Answer:

C. Halogens