Alpha: A particle made of 2 protons and 2 electrons, The least penetrating, Stopped or absorbed by paper, The most ionising, Travels <5cm in air, Beta: A high energy electron, Medium penetrating, Stopped by aluminium foil, Medium ionising, Travels around 1m in air, Gamma: A electromagnetic wave, The most pentetrating, Stopped by thick lead or concrete, The least ionising, Travels >1km in air,

Nuclear Radiation Sort

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