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alpha penetration
low penetration
alpha ionising
strong ionising
alpha can be absorbed by
paper
alpha particles travel
a few cm in air
beta penetration
moderately far
beta ionising
moderately ionising
beta can be absorbed by
a sheet of aluminium
beta travels
a few metres in air
gamma penetration
far into materials
gamma ionising
weakly ionising
gamma can be absorbed by
thick sheets of lead or meters of concrete
gamma travels
a long distance through air
Note 
Flashcard (202)