| A | B |
|---|
| ion | charged atom |
| superscript | sign slightly above the symbol |
| ionic bond | an attraction of positive ions for negative ions |
| NaCl | salt |
| subscript | the number of atoms of an element in a compound |
| molecules | neutral particles formed as a result of atoms sharing electrons |
| covalent bond | the bond that forms between atoms when they share electrons |
| polar molecule | has a slightly more positive end and slightly more negative end |
| nonpolar | molecules that do not have unbalanced charges |
| oxidation number | the number of electrons that an atom gains, loses or shares when bonding |
| binary compound | composed of two elements |
| polyatomic ion | a group of charged, covalently bonded atoms |
| balanced chemical equation | has the same number of atoms of each elements on both sides |
| reactants | found on left side of equation |
| product | found on the right side of the equation |
| coefficient | number in front that shows haw many units of a substance there are |
| synthesis reaction | two or more substances combine, forming another substance |
| decomposition reaction | one substance breaks down into simpler substances |
| single dispacement reaction | occurs when one element replaces another in a compound |
| double dispacement reaction | the positive ion of one compound replaces the positive ion of another compound |
