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Calculation of Radioactive Disintegration Constant

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A radio active substance has a half life of 30 days. Calculate
(a) the radioactive disintegration constant (b) The average life
(c) the time taken for ¾ of the original number of atoms to disintegrate and
(d) the time taken for 1/8 of the original number of atoms to remain unchanged

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Solution with detailed explanations as a word attachment. The calculations of radioactive disintegration constants are given.

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We have, T= 30 days
(a) The radioactive disintegration constant λ = 0.693/T = 0.0231 per day (Ans)

(b) Average life Ta = 1/λ ...

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