A certain radioactive substance has a half-life period of 30 days. What is the disintegration constant ?

A certain radioactive substance has a half period of 30 days. What is disintegration constant?

A radioactive sample has ,a half life of 10 days. What is its disintegration constant? What is its mean life?

A certain radioactive substance has half life period of 10 days. How long will it take for its activity to reduce to 1/8 of its original value ?

A radioactive substance has a half-life period of 40 days. Calculate the time taken for 3/4th of original atoms to disintegrate.

What is the relation between half- life period and disintegration constant ?

A radioactive element has half-life period of 30 days. How much of it will be left after 90 days?

A radioactive element has half-life period of 30 days. How much of it will be left after 90 days?