| A | B |
| atomic structure | the nucleus contains P + N and is surrounded by e- |
| atomic theory | all matter is composed of atoms |
| covalent bond | formed when electrons are shared by two nuclei |
| covalent compound | compound formed when atoms or molecules bond covalently |
| diatomic molecule | having two atoms in each molecule: O2, N2, F2... |
| electron cloud | an area surrounding the nucleus of atom which contains electrons |
| energy level | a specific area where electrons are found as they orbit the nucleus |
| ion | a charged particle which may be a cation (+) or an anion (-) |
| ionic bond | a bond between two ions with opposite charges |
| ionic compound | compound formed when atoms or molecules bond ionically |
| ionic solution | solution containing charged particles |
| molecule | the smallest particle of a compound |
| nonpolar | molecules without positively and negatively charged ends |
| polar | molecules with positively and negatively charged ends |
| subatomic particles | particles smaller than the atom and found within the nucleus |