Nuclear Physics

2. A term describing a non-radioactive atom.
4. An elementary particle representing a quantum packet of light.
5. Term to describe any proton or neutron.
9. Found in the nucleus and has a positive electrical charge.
10. "The ________ Project"; 1940s secret government task of building a nuclear weapon.
12. An electron's antiparticle
13. The number assigned to each element on the basis of the number of protons found in the element's nucleus.
15. Name of the bomb dropped on Nagasaki Japan in 1945.
22. Location in New Mexico where the first nuclear weapons were made and tested.
23. The change of one radioactive nuclide into a different nuclide by the spontaneous emission of alpha, beta, or gamma rays, or by electron capture.
24. "Little ____"; name of bomb dropped on Hiroshima in 1945.
25. Radioactive material deposited or dispersed in materials or places where it is not wanted.
26. Two or more atoms of the same type, but with different masses.

1. A negatively charged particle that orbits an atomic nucleus.
3. Found in the nucleus and has no electrical charge.
6. An electron of either positive charge (ß+) or negative charge (ß-), which has been emitted by an atomic nucleus.
7. A charged atom or molecule.
8. A unit of measure for radiation.
11. A device used to measure different amounts of radiation.
14. The transformation of one element into another by a nuclear reaction.
16. A positively charged particle (a Helium-4 nucleus) made up of two neutrons and two protons.
17. Nuclear reaction that involves splitting a heavy, unstable nucleus.
18. A high energy form of photon radiation emitted during nuclear decay events.
19. Nuclear reaction that involves combining two or more light- weight nuclei to form a heavier atom; occurs naturally on the sun.
20. The spontaneous decay of an unstable atomic nucleus accompanied by the emission of radiation.
21. The amount of time it takes half of a sample of radioactive material to decay.