A certain element has half life period of 30 days. Find its average life

Fr has half life period of

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?

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?

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

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

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 ?