Radioactivity
Across
- 2. the time it takes for the number of remaining nuclei to half in number
- 3. when an atom emits radiation
- 6. the unit for the activity( the number of decays per second)
- 8. a type of radiation involving at Helium nucleus
- 10. contains protons neutrons and electrons
- 11. when an atom gains or loses an electron
- 13. an uncharged particle
- 15. a source of background radiation
- 16. total number of protons and neutrons in an atom
- 17. a positively charged particle
Down
- 1. a type of radiation involving an electron
- 4. a negatively charged particle
- 5. the number of decays per second
- 7. a state an atom can be when it may give out nuclear radiation
- 9. total number of protons in an atom
- 12. has 6 protons
- 14. a type of radiation involving a high frequency elecromangetic wave