What is the half-life of a 12 g sample of radioisotope that decayed to 6 g in 28 years?A.7 yearsB.28 yearsC.56 yearsD.14 years

What is the half-life of a radioisotope if a 100 g sample becomes 50 g after 20 years?A.10 yearsB.20 yearsC.25 yearsD.50 years

What is the half-life of a radioisotope if a 40 g sample becomes 10 g after 20 minutes?A.10 minutesB.50 minutesC.20 minutesD.5 minutesSUBMITarrow_backPREVIOUS

How much of a radioactive kind of chromium will be left after 4 months if you start with 6,080 grams and the half-life is 1 month?

The half-life for radioactive decay of 14C is 5730 years. An archaeological artifact containing wood had only 80% of the 14C found in a living tree. Estimate the age of the sample.

Calculate the half-lives of each of the followingradioisotopes.a It takes 180 days for 80 mg of iron-59 to decayto 5 mg.b It takes 2.1 × 10 12 years for 60 mg ofplatimum-190 to decay to 7.5 mg.