| A | B |
|---|
| matter | anything that has masa and volume |
| mass | amount of matter in something |
| volume | amount of space something takes up |
| atoms | smallest unit of matter |
| particle | very small parts that make up an atom |
| protons | particles in an atom's nucleus that have a positive charge |
| neutrons | particle in an atom's nucleus that have no charge (neutral) |
| electrons | particles in an atom that are outside the nucleus and have a negative charge |
| nucleus | the center of an atom where protons and neutrons are found |
| attract | pull toward |
| repel | push away |
| neutral | no charge (has equal number of + and - charges) |
| element | one or more of the same kind of atom |
| molecule | 2 or more of the same or different kinds of atoms |
| compound | 2 or more different atoms |
