Across
- 3. an element commonly used in nuclear reactions
- 5. Particle a form of radiation that appears in the form of helium atoms
- 6. a neutral particle in the nucleus
- 7. Particle a form of radiation that appears in the form of electrons
- 9. Decay the event in which an atom breaks down in a nuclear reaction
- 10. an element commonly used in atom bombs
- 11. Ray a form of radiation that appears as energy
- 12. a negative particle orbiting the nucleus
- 13. a particle in the nucleus of an atom
Down
- 1. Project the experiments that led up to the creation of the atom bomb
- 2. the combination of two particles to make a new one
- 4. the result of a nuclear reaction
- 8. a positive particle in the nucleus
- 10. the time it takes for a sample of mass to break down to half its mass