| A | B |
|---|
| ion | a charged atom |
| ionic bond | attraction of positive ions for negative ions, transfer of electrons. |
| molecule | neutral particles formed as a result of atoms sharing electrons. |
| covalent bond | bond that forms between atoms when they share electrons |
| polar molecules | molecules with opposite ends or poles. |
| nonpolar molecules | molecules that do not have unbalanced charges. (like charges) |
| oxidation numbers | number of electrons an atom gains, loses or shares when bonding with another atom. |
| binary compounds | composed of two elements |
| polyatomic ions | group of positively or negatively charged covalently bonded atoms. |
| balanced chemical equations | same number of atoms of each element on both sides of equation. |
| chemical formulas | a formula of a compound that represents each element present. |
| compound | a substance that is made up of two or more elements |
| coefficient | a number used to balance equations |
| chemical reactions | the way atoms arrange themselves in a reaction. |
| synthesis reaction | two or more substances combine to form one substance. |
| decomposition reaction | one substance breaks down into two simpler substances. |
| single displacement reactions | one element replaces another in a compound. |
| double displacement reaction | positive ion of one compound replaces another positive ion to form two new compounds. |
