| A | B |
|---|
| Formula | a combination of symbols and subscripts that identifies the composistion of an element, compound or ion |
| formula unit | the collection of atoms described by a chemical formula |
| isomers | different compounds having the same molecular formula |
| electronegativity | the tendancy of atoms in covalent bonds to attract electrons |
| diatomic | molecule containing 2 atoms |
| octet rule | the fact that atoms or ions with an octet are stabel |
| valence electrons | an electron in the outermost electon level |
| ionic bond | the attractive force between oppositely charged ions |
| covalent bond | a bond resulting from electron sharing |
| unshared pairs | a pair of electrons in a molecule or ion that is not shared btween atoms |
