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Chem CH21 Section 1
Chemistry CH21 Section 1 Types of Radioactivity
Term | Definition |
---|---|
alpha particle | a helium nucleus consisting of two protons and two neurons |
beta particle | a high-energy electron with a 1- charge |
gamma ray | a high-energy form of electromagnetic radiation with no charge and no mass |
half-life | the time it takes for half of a given radioactive isotope to decay (into a different isotope or element) |
radioactivity | the spontaneous emission of radiation by an unstable atomic nucleus |