[" For a certain radioactive substance,it is observed that after "4h" ,"],[" only "6.25%" of the original sample is left undecayed.If follows that "]

For a certain radioactive substance, it is observed that after 4h , only 6.25% of the original sample is left undeacyed. It follows that.

For a certain radioactive substance, it is observed that after 4h , only 6.25% of the original sample is left undeacyed. It follows that.

In a given radioactive sample, it is observed that after 415.8 days, 12.5% of the initial sample remains undecayed. Calculate the mean life and decay constant of this sample.

It is observed that only 0.39% of the original radioactive sample remains undecayed after eight hours.Hence:

What percentage of radioactive substance is left after 5 half lives?

It is observerd that only 0.39% of the original radioactive sample remains undecayed after eight hours. Hence,

It is observerd that only 0.39% of the original radioactive sample remains undecayed after eight hours. Hence,