Question

if an electron is promoted into a higher energy level within an atom, what effect would this have on the atoms reactivity?
release energy that is used to break the bonds of other compounds; the atoms will then bond with each other
create a full valence shell; the atom becomes more stable and less likely to react with other atoms.
create more half - filled orbitals that are available to accept or share electrons with different atoms
drop back to ground state and emit a unique light spectrum that can be used to identify the element

Explanation:

When an electron is promoted to a higher - energy level, it creates more half - filled orbitals. These half - filled orbitals can accept or share electrons with other atoms, increasing the atom's reactivity. Releasing energy to break bonds is not directly related to the promotion of an electron. Creating a full valence shell makes an atom less reactive. Dropping back to the ground state and emitting light is about identification, not reactivity.

Answer:

create more half - filled orbitals that are available to accept or share electrons with different atoms