| A | B |
|---|
| ion | a chemically c harged element |
| isotope | an element with more neutrons |
| mass | an object that has weight |
| matter | anything that takes up space |
| proton | positively charged element |
| electron | negative charge in an element |
| neutron | no charge and located in the center of the nucleus |
| electron cloud | located outside of the electron shell |
