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A helium nucleus - Alpha, Anti-electron - Positron, Process when particle & anti-particle meet - Annihilation, Minimum Z for alpha - 82, Symbol for mass number - A, Mass number of alpha - 4, Mass number of beta - 0, Mass number of gamma - 0, Atomic number of alpha - 2, Atomic number of ordinary beta - -1, 'Not made of anything smaller' - Fundamental, Three of them in a proton - Quark, Two of them in a neutron - Down quark, Alpha stopped by (part of body) - Skin, Gamma stopped by (metal) - Lead, Highest ionizing power - Alpha, Highest penetrating power - Gamma, Cyclotron accelerates... - Protons, The ??? of tritium is 12 years - Half life, Radioactive gas which comes up through rocks - Radon, Ionizing radiation from outer space - Cosmic rays, Change to a cell which makes it do something different - Mutation, Detector in PET scanner detects - Gamma, Number of protons is called - Atomic number, Mass number is number of - Protons and neutrons, Two atoms with same number of protons but different numbers of neutrons - Isotopes, Form of radioactivity in smoke alarm - Alpha, Form of radioactivity in medical sterilizer - Gamma,

Radioactive tile race



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