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13 cards from this deck
2 neutrons and 2 protons
Around 5 cm
Single sheet of paper
Very strongly ionising
Electron ejected from nucleus at high speed
Neutron changes into proton and electron
About 15 cm
Few millimetres of aluminium
Quite strongly ionising
Electromagnetic radiation from nucleus
Several metres
Thick lead sheets or metres of concrete
Weakly ionising
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