| A | B |
|---|
| ion | electrically charged atom |
| ionic bond | the attraction between two oppositely charged ions |
| polyatomic ion | ions that are made of more than one atom |
| crystal | orderly three-dimensional pattern of ions or atoms in a solid |
| mineral | a naturally occurring solid that has a crystal strucutre and devinite chemical properties |
| covalent bond | chemical bond formed when two atoms share electrons |
| double bond | type of bond where two atoms share two pair of electrons |
| molecular compound | consist of molecules having covalently bonded atoms |
| polar | type of bond in which valence electrons are shared unequally |
| nonpolar | type of bond where valence electrons are shared equally |
| negative ion | an atom that has gained an electron |
| positive ion | an atom that has lost an electron |
| ionic compound properties | crystal shape, higher melting and boiling points, electrical conductivity |
| molecular compound properties | covalent bonds, lower melting and boiling points, poor conductors of electricity |
