Solution to task 649 from Chertov´s for extramural stud

Solution to task 649 from Chertov´s for extramural stud

649. Determine the number N of nuclei decaying over time: 1) t1 = 1 min; 2) t2 = 5 days, - in the radioactive phosphorus isotope 3215P with a mass of m = 1 mg.

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