| A | B |
|---|
| ion | an atom or group of atoms that has become electrically charged |
| ionic bond | the attraction between two oppositely charged ions |
| polyatomic ions | ions that are made of more than one atom |
| covalent bond | a chemical bond formed when two atoms share electrons |
| double bond | when two pairs of electrons are shared between oxygen atoms |
| molecular compounds | consist of molecules having covalently bonded atoms |
| polar | a covalent bond in which electrons are shared unequally |
| nonpolar | when valence electrons are shared equally |
