| A | B |
|---|
| protons | positively charged subatomic particles |
| neutrons | subatomic particles with no charge |
| electrons | negatively charged subatomic particles |
| matter | what everything is made of |
| mass | measure of how much space something takes up |
| weight | measure of force of gravity on an object |
| atomic number | number of protons in a atom |
| mass number | number of protons and neutrons ia a atom |
