All knowledge mats
Physics · GCSE
Random, but Perfectly Predictable
If nobody can say which nucleus decays next, how can a half-life be known to the second? The nucleus and isotope notation; alpha, beta and gamma, with penetration and ionising power drawn running opposite ways; half-life, fission and fusion; six distinctions that decide an answer, from contamination to background radiation; a worked decline as a ratio. Ten terms to define, a model answer on why alpha is worst inside the body, and the misconceptions that cost marks.
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