`(3)/(4) `part of a radioactive sample disintegrates in first 10 yrs. How much fraction will disintegrate in first 20 Yrs ?

A radioactive sample disintegrates by 10% during one month. How much fraction will disintegrate in four months :-

36% amount of a radioactive sample disintegrates in t time. Calculate how much percentage fraction will decay in t//2 time.

7//8 fraction of a sample disintegrate in t time How much time it will take to disintegrate 15 //16 fraction :

What parts of a radioactive element is disintegrated in its average life period?

4 gram of a radioactive material of half life 10 years is kept for 15 years. How much of the material will disintegrate?

The half-life of a radioactive substance is 48 hours. How much time will it take to disintegrate to its (1)/(16) th parts ?

Radioactive disintegration is a first order reaction. Explain why.

Radioactive decay is a first order rate process. Two-third of a radioactive isotope disintegrates in 30 min. What is the rate constant of the disintegration?

A radioactive element disintegrates for a time interval equal to its mean life. The fraction that has disintegrated is

A radioactive element disintegrates for a time interval equal to its mean life. The fraction that has disintegrated is