Nuclear Energy Crossword

2. A type of radiation that can be stopped by a piece of paper or clothing.
4. _____ Becquerel, using U-238, discovered the radioactive nature of elements.
6. decay ____________ is a penetrating ray of energy emitted by an unstable nucleus. This type of radiation can only be stopped by several centimeters of steel or meters of concrete.
7. The man who came up with the mass energy equation that explains how the energy from nuclear fission is converted. The equation is E=mc2
8. The _______ Nuclear Power Plant is the closest nuclear power plant to Brecksville/Broadview Height. The plant is about 52 miles away.
11. The threat of a runaway reaction is a _________ of nuclear power.
13. decay The release of a negatively charged particle (electron) by a nucleus is called _______. This type of radiation can be stopped by millimeters of aluminum.
15. There are _____ types of radiation; alpha, beta, and gamma.
17. Any atom containing an unstable nucleus that spontaneously changes into a more stable isotope is called a ________.
18. fission ___________ is the splitting of an atomic nucleus into 2 smaller parts.

1. Along with Strassmann, ____ discovered nuclear fission when trying to create larger elements by adding neutrons to isotope U-238.
3. Large quantities of energy and no air pollution are both examples of _________ of nuclear power.
5. An atom is unstable because of the _____ of protons to neutrons
9. the process by which an unstable atom nucleus emits charged particles and energy
10. When material spontaneously emits radiation it is classified as _____.
12. Nuclear energy is a type of _______ energy because all the energy is stored in the nucleus of an atom.
14. The fission of _______ atoms replace the burning of coal or gas in a nuclear power plant. The most common isotopes are U-238 and U-235.
16. The time required for 1/2 of a sample of a radioisotope to decay.