The Reactivity of an Atom Arises from the

Multiple Choice

The reactivity of an atom arises from the

A) energy differences between the orbitals that contain its electrons.
B) number of electrons in the outermost electron shell.
C) number of electron shells in the atom.
D) sum of the potential energies of all electron shells.
E) potential energy of the outermost electron shell, or valence shell.