Across
- 2. radioactive isotope
- 3. discharge into air
- 5. short range attractive force that holds a nucleus together
- 7. a particle equal to an electron but with a positive charge
- 9. fast moving helium nucleus
- 10. force between elementary particles that causes radioactive beta decay and collisions
- 12. spontaneous emitting of radiation from an element
- 13. used to measure radiation
- 16. high speed electrons or positrons emitted from radioactive nuclei
- 17. atomic species where all atoms have the same atomic mass and mass number
Down
- 1. changing of one element to another through radioactive decay
- 4. observation that metals emit electrons when light shines on them
- 6. splitting of an atom
- 8. part of a nucleus, proton or neutron
- 11. nuclear reaction where two or more atomic nuclei collide combining together
- 14. time it takes for half of a radioactive nuclei to under go radioactive decay
- 15. electromagnetic radiation