PLEASE HELP, I WILL MARK BRAINIEST
what determines an atom's reactivity?

#1. how many protons the atom contains
#2. how many energy levels the atom contains
#3. whether the atom is a metal or a non-metal
#4. how many valence electrons the atom contains

Respuesta :

Answer:

D) How many valence electrons the atom contains.

Explanation:

This is the only closest one

because the number of electrons in the outermost shell is the correct answer