What determines an atom's reactivity? a)how many protons the atom contains. b)how many energy levels the atom contains. c)whether the atom is a metal or a nonmetal. d)how many valence electrons the atom contains. plz

D

Explanation:

If they have max valence electrons they arent very reactive ( non reactive)

very reactive atoms need fewer electrons to be reactive

answer; gender,race,age,/// (d) all of these;

answer; multidisciplinary;