Across
- 2. type of radiation where an electron or positron is released
- 3. the minimum amount of an isotope necessary to sustain a chain reaction
- 5. an atom of the same element that has the same number of protons but a different number of neutrons
- 9. type of radiation where two protons and two neutrons are released from the nucleus
- 11. the reaction where a heavy, large atom is split into two smaller, lighter atoms
- 15. process of change within an atom's nucleus that produces a different element
- 16. the name of the female scientist who discovered radium and polonium
- 17. French scientist who discovered radiation
- 22. the machine that detects and measures radiation
- 24. the type of nucleus that naturally decays and falls apart
Down
- 1. the sequence of steps that produces a nonradioactive element from a radioactive one
- 4. the element used in nuclear reactors
- 6. the ability of some elements to give off nuclear radiation as a result of a change in the atom's nucleus
- 7. electromagnetic wave that can accompany alpha and beta decay
- 8. the name of the scrolls that were found in 1947
- 10. radioactive isotope whose pathway can be following through the body
- 12. the exposure of food to radiation to kill harmful bacteria
- 13. the type of energy category into which nuclear energy falls
- 14. the time it takes for one-half of the atoms of an isotope in a given sample to decay into atoms of a different element
- 18. the element whose isotope is used to determine the age of substances with organic origins
- 19. the type of nucleus that does not decay and does not fall apart
- 20. the reaction where two lighter atoms are joined to form a larger, heavier atom
- 21. when fuel in a nuclear reaction reaches a high enough heat to melt and radiation leaks out
- 23. what the capital E stands for in the formula E=mc²