P. 4473. 0.06 mass percent of the human body is potassium, and 0.012% of this is the potassium isotope of atomic mass number 40. This isotope is radioactive, it decays, and its half life is 1.3 miliard years. How many decays occur in each second in the body of a 60-kg man due to the potassium in the human body?
Deadline expired on 12 November 2012.