A radioactive sample contains `1.00xx10^15` atoms and has an activity of `6.00xx10^11` Bq. What is its half-life?

A radioactive substance contains 10^15 atoms and has an activity of 6.0xx10^11 Bq. What is its half-life?

A radioactive substance contains 10^15 atoms and has an activity of 6.0xx10^11 Bq. What is its half-life?

A radioactive substance contains 10^(15) atoms and has an activity of 6.5 xx 10^(11) Bq. What is its half life.

Iiodine -131 is a radioactive isdotpe. If 1.0 mg of ""^(131)I has an activity of 4.6xx10""^(12) Bq. What is the half-life of ""^(131)I (in days)

Iiodine -131 is a radioactive isdotpe. If 1.0 mg of ""^(131)I has an activity of 4.6xx10""^(12) Bq. What is the half-life of ""^(131)I (in days)

Iodine -131 is a radioactive isdotpe. If 1.0 mg of ""^(131)I has an activity of 4.6xx10""^(12) Bq. What is the half-life of ""^(131)I (in days)

A sample of a radioactive element that contains 1.0 xx 10^(3) nuclie decays to 6.2 xx 10^(1) nuclei in 10minutes . What is its sepecific decay constant?

A sample of radioactive material has an activity of 9xx10^(12) Becquerel. The material has a half life of 80s. How long will it take for the activity to falls to 2xx10^(10) Becquerel ?

A radioactive sample of half-life 30 d contains 10^12 particles at an instant of time. Find the activity of the sample.

The decay constant of a radioactive element is 1.05xx10^(-4) / year. What is its half life ?