| A | B |
|---|
| covalent bond | a chemical bond formed when two atoms share one or more pairs of valence electrons |
| molecule | a group of atoms held together by covalent bonding that acts as an independent unit. |
| polar molecule | a molecule that has a partial positive end and a partial negative end because of unequal sharing of electrons |
| chemical formula | a group of chemical symbols and numbers that represent the elements and number of atoms of each element that make up a compound |
| chemical bond | a force that holds two or more atoms together |
| valence electron | an outermost electron of an atom that participates in chemical bonding |
| electron dot diagram | a model that represents valence electrons in an atom as dots around the element's chemical symbol |
| ion | an atom that has a charge because it has gained or lost electrons. |
| ionic bond | attraction between positively and negatively charged ions in an ionic compound |
| metallic bond | a bond formed when many metal atoms share their pooled valence electrons |
