NUCLEAR ENERGY

5. / each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
10. /a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal magnitude to that of an electron, but of opposite sign.
11. /an electron or positron that is thrown out from the nucleus of an atom during radioactive decay
12. /the energy released during nuclear fission or fusion, especially when used to generate electricity.
13. /a nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another particle, with the release of energy.
14. /the number of a chemical element in the periodic system and on the periodic table that equals the number of protons in the nucleus of the atom

1. /a nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus with the release of energy.
2. /a chemical reaction or other process in which the products promote or spread the reaction, which may accelerate dramatically under certain conditions.
3. /is a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei.
4. /the time required for one-half the atoms of a given amount of a radioactive substance to disintegrate
6. / the emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
7. / a helium nucleus emitted by some radioactive substances, originally regarded as a ray.
8. /The neutron is one of the three subatomic particles that make up an atom.
9. /the number of protons and neutrons in a nucleus.
13. /the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.