Across
- 3. The electrical charge of an electron
- 5. The electrical charge of a neutron
- 7. A particle has almost the same mass as the proton
Down
- 1. The electrical charge of a proton
- 2. A charged particle inside the nucleus
- 4. A charged particle with a negative charge.
- 6. The smallest part of the matter
- 8. the location of both protons and neutrons