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radio activity - Coggle Diagram
radio activity
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particles
alpha
the biggest of them all cannot pass through a piece of paper and can only go 5m through air without being reflected.
beta
the second biggest then can pass through air and through a thin sheet of paper but cannot get through gold foil.
gamma
the smallest and the most dangerous because it can travel through air the paper and the gold foil it cant get through a thick piece of aluminium
proton , neutrons and electrons
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halflife
the half-life of a radioactive isotope is the average time it takes for the number of nuclie of the isotope in a sample to half.