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7.5 describe the nature of alpha and beta particles and gamma rays and recall that they may be distinguished in terms of penetrating power

7.5 describe the nature of alpha and beta particles and gamma rays and recall that they may be distinguished in terms of penetrating power

Radiation Ionising power Penetrating range in air Example of range in air Radiation stopped by
Alpha,α strong weak 5-8cm paper
Beta, β medium medium 500-1000 cm Thin aluminium
Gamma, γ weak strong Virtually infinite Thick lead sheet