| A | B |
| atom | basic unit of matter |
| element | substance that only has one type of atom (examples: C, H, O, N, P, S) |
| electron | negatively charged subatomic particle found outside the nucleus of an atom |
| ion | charged particle resulting from a gain or loss of electrons |
| chemical bond | force which holds atoms or ions together |
| covalent bond | chemical bond in which atoms share electrons |
| molecule | a group of atoms held together by chemical bonds |
| Mrs. Nickel | the meanest teacher in the world for making us learn all of these terms |
| proton | positively charged subatomic particle found in the nucleus of an atom |
| neutron | a subatomic particle found in the nucleus of an atom that does not have a charge |
| ionic bond | chemical bond that involves a transfer of electrons |
| atomic number | the number of protons in the nucleus of an atom |
| mass number | the number of protons plus the number of neutrons in the nucleus of an atom |
| matter | anything that has mass and volume |