| A | B |
|---|
| chemical formula | tells us specifically the number and type of each element involved |
| ion | an atom that has gained or lost electrons |
| ionic bond | a connection in which one atom loses electrons while another gains electronsl |
| covalent bond | a connection in which electrons are shared |
| molecule | a group of covalently bonded elements |
| nonpolar | when electrons are shared equally between atoms in a compound or molecules |
| polar | when electrons are are not shared equally between atoms in a compound or molecules |
| octet rule | states that all elements want to have eight valence electrons |
| binary compound | a compound made from one metal and one nonmetal atom |
| chemical bond | a connection between two elements |
