Radioactive elements Word Scramble
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| Question | Answer |
| nuclear reaction | a reaction involving particles in the nucleus of an atom, it can change one element into another element |
| radioactive decay | the process in which the atomic nuclei of unstable isotopes release fast-moving particles and energy |
| radioactivity | the spontaneous emission of radiation by an unstable atomic nucleus |
| alpha particle | a type of nuclear radiation consisting of two protons and two neutrons |
| beta particle | a fast -moving electron that is given off as nuclear radiation |
| gamma radiation | a type of nuclear radiation made of high-energy waves. It can be stopped by lead |
| half-life | the length of time needed for half of the atoms of a sample of a radioactive isotope to decay |
| radioactive dating | the process of determining the age of rocks and fossils using the half-life of radioactive isotopes |
| tracer | a radioactive isotope that can be followed through the steps of a chemical reaction or industrial process |
| Henri Bacquerel | discovered the effects of radioactive material |
| Marie and Perri Curie | pioneered the study of radioactive elements |
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