Across
- 2. Fission- atoms are split apart, which releases energy
- 5. a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
- 7. Radiation- It can be used to treat cancer
- 9. positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
- 10. particle- a fast-moving electron emitted by radioactive decay of substances.
- 12. each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei,
- 13. reaction- the self-sustaining fission reaction spread by neutrons which occurs in nuclear reactors and bombs.
Down
- 1. radioactive substances, or the radiation emitted by these.
- 3. Particle- composite particles consisting of two protons and two neutrons tightly bound together
- 4. Fusion- two light nuclei merge to form a single heavier nucleus.
- 6. a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
- 8. Number- the total number of protons and neutrons in a nucleus
- 11. number- the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table
- 14. life- Amount of time something takes to decay