The sample of a radioactive substance ha...

The sample of a radioactive substance has `10^6` nucei. Its half life is 20 s . The number of nuclei that will be left after 10 s is neary .

A

`7 xx10^(5)`

B

`8.5 xx 10^(5)`

C

`8 xx 10^(5)`

D

`7.5 xx 10^(5)`

Verified by Experts

The correct Answer is:

A

Similar Questions

Explore conceptually related problems

A radioactive substance has 10^8 nuclei. Its half life is 30 s . The number of nuclei left after 15 s is nearly

A sample of a radioactive substance has 10^(6) radioactive nuclei. Its half life time is 20 s How many nuclei will remain after 10 s ?

If the half-life of a radioactive sample is 10 hours its mean life is ?

Mean life of a radioactive sample is 100s . Then ,its half-life (in min) is

If the half-life of a radioactive sample is 10 hours its mean life is

Number of nuclei of a radioactive substance are 1000 and 900 at times t=0 and time t=2 s . Then, number of nuclei at time t=4s will be

The initial concentration of a radioactive substance is No and its half life is 12 hours. What will be its concentration after 36 hours?

The activity of a radioactive sample is 1.6 curie, and its half-life is 2.5 days . Its activity after 10 days will be

The half life of a radioactive substance is T_(0) . At t=0 ,the number of active nuclei are N_(0) . Select the correct alternative.

A sample of a radioactive substance undergoes 80% decomposition in 345 minutes. Its half life is …………minutes