Across
- 3. subatomic particle with a negative charge
- 5. Radiation that is an electromagnetic wave
- 6. the middle of an atom
- 9. subatomic particle with no charge
Down
- 1. atoms with the same number of protons but different numbers of neutrons
- 2. Radiation that is made of two protons and two neutrons
- 4. subatomic particle with a positive charge
- 7. orbitals that electrons go around the nucleus on
- 8. Radiation that is an electron