Across
- 4. When one thing happens and it causes a reaction for the other elements involved and keeps happening; Happens during Fission
- 6. The number on the bottom of an element on the periodic table
- 9. When a nucleus is unbalanced so it divides into 3 neutrons
- 10. When a nucleus has a low atomic number so it fuses with another element to create a bigger nucleus
- 12. Negatively charged decay
- 14. Element with a different atomic number than the periodic table
Down
- 1. Used to treat cancer; Neutrally charged decay
- 2. The number at the top of an element; Same as proton number
- 3. Emitted by radioactive substances
- 5. Neutrally charged atom
- 7. In the middle of an atom; Has protons and neutrons
- 8. The time it takes for half an element to decay
- 11. Positively charged radioactive decay
- 13. Positively charged atom