| A | B |
| chemical bonding | combining of atoms to form molecules or compounds |
| valence electrons | electrons in the outermost energy level |
| ionic bond | bond formed when electrons are gained or lost |
| ion | charged atom |
| crystal lattice | 3-dimensional pattern formed from an ionic bond |
| covalent bond | bond formed when electrons are shared |
| molecule | smallest part of a substance made in a covalent bond |
| metallic bond | bond formed by positively charged ions and surrounding electrons |