Penetration power of radiation chart
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Gamma radiation is the most penetrating. Even small levels can penetrate air, paper or thin metal. Higher levels can only be stopped by many centimetres of.
IGCSE/GCSE/O Level Physics & Chemistry revision notes on Radioisotopes - this Penetrating power (and speed), and what will block it (more dense material.
Description:Alpha, beta, and neutron particles, and gamma and X-rays. All types are caused by unstable atoms, which have either an excess of energy or mass or both. In order to reach a stable state, they must release that extra energy or mass in the form of radiation.