Across
- 2. spontaneous loss of particle or gamma radiation
- 4. atoms that spontaneously emit subatomic particles and/or energy
- 7. hollow metal cylinder filled with uranium
- 9. energy in an atom
- 11. simplest form of matter
- 13. the time it takes for half of the radioactive isotopes in a sample to decay
Down
- 1. atoms that have the same number of protons but different number of netrons
- 3. substance composed of all the same type of atoms
- 5. rod that absorbs neutrons and slows fission
- 6. reaction that occurs when a neutron strikes the nucleus of an atom and breaks it
- 8. radiation that consists of electrons
- 10. radiation that consists of two protons and two neutrons
- 12. high energy electromagnetic waves