1.2 Radioactivity 0.0 / 5 ? ChemistryRadioactivityASWJEC Created by: rxchelhorneCreated on: 17-02-16 16:59 What is half-life? The time taken for a radioactive isotope to decay to half its initial value 1 of 6 What is positron decay? B+ decay, another sub-type of beta decay. A proton is converted into a neutron whilst releasing a positron and an electron neutrino 2 of 6 What is electron capture? One of the orbital electrons is captured by a proton in the nucleus, forming a neutron and emitting and electron neutrino 3 of 6 What is gamma used for in medicine? Technetium-99 is used as a tracer. Cobalt-60 is used to treat cancer. 4 of 6 How can carbon-14 be used? To calculate the age of a plant or animals remains 5 of 6 What is potassium-40 used for? Its used to estimate the geological age of rocks 6 of 6
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