After two hours `1//6` th of the initial amount of a certain radioactive isotope remains undecayed. The half life of the isotope is :

After 1 hour, 1/8 of the initial mass of a certain radio active isotope remains undecayed. The half-life of the isotope is

After two hours, one sixteenth of the starting amount of a certain radioactive isotope remained undecayed. The half-life of the isotope is

After two hours, one-sixteenth of tge starting amount if a certain radioactive isotope remained undecayed. The half-life of the isotope is

After two hours, one-sixteenth of tge starting amount if a certain radioactive isotope remained undecayed. The half-life of the isotope is

After an interval on one day 1//6th of the initial amount of a radioactive material remains in a sample. Then its half life is

After 24 hour, only 0.125" g" out of the initial quantity of 1 g of a radioactive isotope remains behind. The half-life period of the radioactive isotope in hours is

After 24 hours, only 0.125 g out of the initial quantity of 1 g of a radioactive isotope remains behind. What is its half-life period ?