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Radioactive nuclei can emit alpha, beta or gamma radiation. Which type of radiation is the most penetrating?
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Radioactive nuclei can emit alpha, beta or gamma radiation.

Which type of radiation is the most penetrating?

User Ul
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Gamma radiation is the most penetrating. It can penetrate air, paper or thin metal. It may only be stopped by many centimetres of lead or many metres of concrete.

User Jim Biard
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