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

A radioactive element has a half life of 20 days . What amount would be left after 80 days , if the original amount was 8 g?

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

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

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

A certain radioactive element has half-life of 4 days. The fraction of material that decays in 2 days is

A certain radioactive element has half-life of 4 days. The fraction of material that decays in 2 days is

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