The reactivity of an atom depends on the number of
A) protons.
B) neutrons.
C) protons plus neutrons.
D) valence electrons.
E) protons and electrons.

Question

Quizplus · Accepted Answer

The reactivity of an atom primarily depends on the number of valence electrons it has. Valence electrons are the electrons in the outermost shell of an atom and determine how the atom can bond with others.

The Reactivity of an Atom Depends on the Number of