Across
- 4. consist of two protons and two neutrons
- 5. are a type of ionizing radiation
- 9. negatively charged
- 12. when an unstable atomic nucleus loses energy by radiation
- 13. have no electric charge
- 15. number of protons in an atom
- 16. have a positive charge of 1+
- 17. when the nucleus of an atom becomes unstable
- 19. number after an element's name
- 20. same element, different numbers of neutrons
Down
- 1. where the mass of each isotope is multiplied by the abundance of that particular isotope
- 2. energy that comes from a source and travels through space at the speed of light
- 3. a high-energy, high-speed electron
- 6. contains electrons, protons, and neutrons
- 7. used to describe a nuclear reaction
- 8. a unit of mass used to express atomic and molecular weights
- 10. travels to the anode of a tube
- 11. rays off of energy or particles
- 14. electromagnetic radiation arising from the radioactive decay of atomic nuclei
- 18. when two things collide to produce one or more new nuclides