Across
- 3. The electrical charge of an electron.
- 6. Particles found in the nucleus with no electrical charge.
- 7. The electrical charge of a proton.
- 8. Materials on Earth that are composed of only one type of atom, e.g.lead.
- 10. The electrical charge of a neutron.
Down
- 1. The solid core of an atom.
- 2. Very small pieces of matter.
- 4. Positively charged particles found in the nucleus.
- 5. Tiny particles from which everything is made.
- 9. Negatively charged particles orbiting the nucleus.