Across
- 3. Keeps the nucleus together; has no charge
- 7. Emits particles which then releases energy; _____ equals division
- 9. When a neutron forms into a proton which causes a electron to be released.
- 11. Number of protons and neutrons combined.
- 13. When one event occurs which causes other events to occur
- 14. 2 protons and 2 neutrons (Helium nuclei)
Down
- 1. The number of protons in the nucleus
- 2. 2 hydrogen nuclei that combine which then releases mass amounts of energy
- 4. Center of the atom; contains protons and neutrons
- 5. The time it takes for half a radioactive sample to decay
- 6. When the amount of protons and neutrons in an atom is not identical to the mass on the periodic table
- 8. An unstable element that is going through nuclear decay
- 10. Gives the atom its identity; has a positive chare
- 12. Rays of energy released from the nucleus; the most dangerous type of decay