Across
- 3. The isotope of hydrogen that starts with a 't'
- 4. Smallest particle to exist
- 6. First element on periodic table
- 9. An isotope of hydrogen that starts with a 'd'
- 12. A particle in the nucleus that has a neutral charge
- 13. Power derived from heat or a reaction
- 14. A sphere of plasma help by its own gravity
Down
- 1. Another word for splitting
- 2. When particles come together to form something is called
- 5. Emission of energy waves or particles
- 6. The time taken for radioactivity to half itself
- 7. A particle in the nucleus that has a negative charge
- 8. To Decompose
- 10. Second element on periodic table
- 11. A particle in the nucleus that has a postitive charge