Match the terms to their definition.

1. atom
subatomic particle residing in the nucleus that has a neutral charge
2. compound
subatomic particle residing in the nucleus that has a positive (+) charge
3. electron
a substance composed of two or more different types of atoms
4. molecule
subatomic particle orbiting the nucleus that has a negative (-) charge
5. neutron
a unit of matter composed of two or more atoms held together by chemical bonds
6. proton
the smallest particle of matter retaining the same chemical and physical properties