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OpenStudy (anonymous):
Is Alpha particles or Beta particles more Penetrating
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OpenStudy (anonymous):
Alpha particles can't penetrate through a thin sheet of paper, while it takes a thin sheet of aluminum to stop a beta particle. Fun tidbits: Gamma rays have to be stopped by concrete, and some neutrons (IIRC) can go straight through a planet without losing momentum. Chemistry's the best ;) http://www.passmyexams.co.uk/GCSE/physics/penetrating-properties-of-radiation.html has more info
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