| A | B |
| Chemical bond | force that holds two atoms together |
| chemical formula | combination of chemical symbols and numbers for molecule make-up |
| compound | substance produced when elements combine and make something new |
| covalent bond | chemical bond formed when atoms share electrons |
| electron cloud | area where negatively charged electrons travel around an atom's nucleus |
| electron dot diagram | symbol for number of electrons in atom's outer shell |
| energy level | different positions for an electron in an atom |
| ion | positively/negatively charged atom that has gained/lost electrons |
| ionic bond | attraction that holds oppositely charged ions close togehter |
| metallic bond | bond formed when metal atoms share their pooled electrons |
| molecule | neutral particle formed when atoms share electrons |
| polar bond | bond resulting from the unequal sharing of electrons |