Across
- 5. force that holds the nucleus together
- 6. when neutron decays into proton and releases an electron
- 8. become converted to ions
- 11. maintaining equilibrium
- 12. device used to detect radiation
- 14. splitting a large atom into 2 smaller atoms
- 15. force that electric charges exert on each other
- 17. particle made of 2 protons and 2 neutrons (emitted during decay)
- 20. decaying from one element into another
Down
- 1. amount of time needed for 50% of a radioactive substance to decay
- 2. positively charged dense center of atoms
- 3. direct high energy particles or radiation against on atom
- 4. force of attraction between 2 objects
- 7. newly created atom (after radioactive decay)
- 9. combining 2 small atoms to make a larger atom
- 10. original element (before radioactive decay)
- 13. when unstable nucleus decays and emits particles
- 16. atoms of the same element with different number of neutrons
- 18. give off, send forth, discharge
- 19. radiation of energy without particles