Across
- 2. an uncharged atomic particle that has a mass nearly equal to that of the proton
- 4. They have the same atomic number and position in the periodic table, but differ in nucleon numbers due to different numbers of neutrons in their nuclei
- 5. Unlike alpha and beta particles, which have both energy and mass, theese rays are pure energy.
- 8. a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of decay
- 9. composite particles consisting of two protons and two neutrons tightly bound together
- 10. a reaction in which the nucleus of an atom splits into two or more smaller nuclei
- 11. a sequence of reactions where a reactive product or by-product causes additional reactions to take place.
- 12. a proposed form of power generation that would generate electricity by using heat from nuclear fusion reactions
- 13. a positive electric charge ts mass is slightly less than that of a neutron
Down
- 1. nuclei that are unstable and that decay by emitting energetic particles
- 3. the emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
- 6. the total number of protons and neutrons in a nucleus.
- 7. the amount of time it takes to decay half of an element
- 9. the number of protons in the nucleus of an atom