Across
- 3. 0/-1 e
- 4. When the nuclei become one
- 6. No effect on reaction numbers
- 7. No reactions happen at the same time
- 9. when the isotope is radioactive
- 10. same element different number
- 12. helps in determining stability
Down
- 1. cannot be found on the periodic table
- 2. The identifiable factor for a atom
- 5. The instability of a radioisotope
- 8. When the nucleus spilts
- 11. Be positive