Define the term ‘decay constant’ of a radioactive sample. The rate of disintegration of a given radioactive nucleus is 10000 disintegrations/s and 5,000 disintegrations/s after 20 hr. and 30 hr. respectively from start. Calculate the half life and initial number of nuclei at t = 0.
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Decay constant, proportionality between the size of a population of radioactive atoms and the rate at which the population decreases because of radioactive decay. ... The relationship between the half-life, T1/2, and the decay constant is given by T1/2 = 0.693/λ.
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