Across
- 2. A neutral subatomic particle
- 6. This type of radiation is also known as a helium nucleus
- 10. An unstable variation of an atom that must emit radiation to become stable
- 11. The element used by Rutherford to discover the modern structure of the atom
- 12. You use this in your kitchen, but it also stops beta radiation
- 13. Beta particles are also known as .........
Down
- 1. Aside from skin, this stops alpha radiation
- 3. Beta particles have this charge
- 4. The third type of radiation that is also an electromagnetic wave
- 5. The gain or loss of an electron
- 7. This gives a nucleus an overall positive charge
- 8. A thick layer of this stops gamma radiation
- 9. A variation of an atom that contains more neutrons in the nucleus