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Radioactive elements

vocabulary for radioactive elements

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
Created by: hallet



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