If the fraction of the atoms of a radioactive material left after 120years is 1/64; what is the half-life of the material? 1/64 By: Sunday|Published on: Nov 1|Categories: Physics JAMB| 0 comments A. 20 years B. 10 years C. 2 years D. 24 years Correct Answer: Option A – 20 years Users Also Read These:A radioactive element has a half life of 4 days. The…A radioactive substance has a half-life of 20 hours. What…The half-life of a radioactive substance is?In 24 days a radioactive isotope decreases in mass from 64g…The count rate of radioactive material is 800 count/min. If…SEE ALSO Calculate the mass of ice that would melt when 2kg of copper is quickly transferred from boiling water to a block of ice without heat loss?