| A | B |
|---|
| chemical formula | tells elements in a compound and the ratio of the atoms |
| chemically stable | an atom with a valence level that is completely filled |
| ion | a positively or negatively charged atom |
| oxidation number | a number that shows an element's combining ability |
| polyatomic ion | a charged, covalently bonded group of atoms |
| hydrate | a compound that has water chemically attached to its ions |
| polar molecule | a molecule with opposite charges on each end |
| nonpolar molecule | a molecule that does not have oppositely charged ends |
| binary compound | a compound that is composed of two elements |
| chemical bond | a force that holds the atoms in a compound together |
| ionic bond | a bond formed by the attraction between ions' opposite charges |
| covalent bond | a chemical bond formed by atoms when they share electrons |
| corrosive | hazardous compounds that attack and alter metals tissue or other materials |
| toxic | hazardous substances that injures living tissue poisonous |
