Across
- 4. chemical reactions where the products spread the reaction
- 6. total number of protons and neutrons in the nucleus
- 9. reaction where the nucleus splits spontaneously
- 10. process where two atomic nuclei combine to form one
- 12. high speed electron emitted by radioactive decay
- 14. atoms of the same element that have a different mass number
Down
- 1. electromagnetic radiation arising from radioactive decay
- 2. the number of protons in the nucleus of an atom
- 3. the ability of an atom to emit mass and energy
- 5. neutrally charged atom
- 7. center of the atom
- 8. the amount of time it takes a substance to decay by half
- 11. 2 protons and 2 neutrons bound together to make a helium nucleus
- 13. positively charged atom