Chromium-51 is a radioisotope that is used to assess the lifetime of red blood cells The half-life of chromium-51 is 27.7 days. If you begin with 52.1 mg of this isotope, what mass remains after 53.2 days have passed?

The half-life of 90Sr is 29 years. What fraction of the atoms in a sample of 90Sr would remain 175 years later? 13 Multiple Choice 01:24:05 0.12 0.062 0.50 0.17 0.015

If 1/8 of a radioactive element remains after 600 years, what is the element half life? Please explain steps?

A radioactive isotope has a half-life of 25 years. There was 100 mg of the isotope initially. a) Determine a base e function to model the amount of the isotope that remains after t years. b) How quickly is the amount of remaining isotope changing 10 years from now? Round to 1 decimal place.

The decay of cesium-135 is first order with a half life is 3.0 million years. How much of 1.0847 g sample would remain after 9.50 million years?        Please type answer not write by hend