Across
- 2. atoms of an element with a differing number of neutrons in it's nucleus.
- 4. the center of an atom; contains protons and neutrons.
- 6. nucleus split apart, releasing energy; used in nuclear power plants.
- 9. the mass of the total number of protons and neutrons in a nucleus.
- 10. the time required for 1/2 of atoms of a radioactive substance to decay
- 11. the number of protons in a nucleus.
- 12. 2 protons and 2 neutrons bonded together and emitted from the nucleus during radioactive decay
- 13. the emission of radiation by an unstable nucleus.
- 14. a subatomic particle found in the nucleus of an atom; has a positive charge
Down
- 1. nuclei fuse together to form a heavier nucleus; requires large amounts of heat; the reaction that occurs in the sun.
- 3. a subatomic particle that has no/neutral charge and is in the nucleus of an atom.
- 5. when gamma rays and energy are emitted from an unstable nucleus.
- 7. a chemical or nuclear reaction producing energy or products that trigger other reactions.
- 8. an electron emitted from the nucleus during radioactive decay.