`1 mg` gold undergoes decay with `2.7` days half-life period, amount left after `8.1` days is

If 20% of a radioactive sample decays in 10 days, then the amount of substance left after 20 days will be approximately

If 10% of a radioactive material decays in 5 days, then the amount of original material left after 20 days is approximately.

If 10% of a radioactive material decays in 5 days, then the amount of original material left after 20 days is approximately.

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 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?