Across
- 5. came up with modern atom
- 6. two small nuclei join to make a long nucleus
- 7. in the atom the amount of protons and___are the same
- 9. admisión from unstable nucleus to stabilize atom
- 11. exposing a object to nuclear radiation
- 12. Alpha gamma and _____ types of ionizing radiation
- 14. stopped by paper
- 15. alpha radiation is the same as
Down
- 1. beta radiation is_____ionising
- 2. discovered the electron
- 3. alpha radiation is most ionizing and ____to cells
- 4. fission used in nuclear power cells
- 8. contamination is unwanted presence of_________atoms
- 10. same number of proton different number of neutron
- 13. time taken too loose half of initial radioactivity
- 16. gamma stoped by