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atoms
| Term | Definition |
|---|---|
| atom | basic unit of matter |
| compound | two or more elements combined |
| covalent bond | moving electrons travel about the nuclei of both atoms |
| electron | negative charge |
| element | one type of atom |
| ion | positive and negative charged atoms |
| ionic bond | one or more electrons are transferred from an atom to another |
| isotope | atoms that differ in the amount of neutrons |
| molecule | smallest unit of compounds |
| neutron | neutral charge |
| nucleus | center of the atom |
| proton | positive charge |
| valance electron | outer shell electrons |
| van der waals forces | intermolecular forces of attraction |