Chemical symbol:a letter or group o fletters that represent an elemnt in a chemical formula Oxyanions: negatively charged compound ion containing oxygen Compound ions: an ions made of several different atoms covalkenty bonded togethrr Molecular formula:a formula that shows the actal number of atoms of each elemt of a molecule Empirical formula: forula that shows the number of atomd in the simplest ratios Word equation: Reactants: Products: Balanced chemical equation: State symbols: Spectator ions: Ionic equation: Formula units: Relative molecular mass: Relative formula mass: Water of crystallization: