radioactivity 0.0 / 5 ? PhysicsRadioactivityGCSEEdexcel Created by: MSW3693Created on: 02-11-17 12:40 Geiger counter a device used to measure the radioactivity of objects 1 of 5 Alpha particle Two protons and two neutrons – the same as a helium nucleus 2 of 5 Beta particle Fast-moving electron 3 of 5 Gamma ray High energy electromagnetic radiation 4 of 5 Ionising radiation radiation that has enough energy to cause other atoms to lose electrons and form ions 5 of 5
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