`90%` of a radioactive sample is left undecayed after time `t` has elapesed. What percentage of the initial sample will decay in a total time `2 t` ?

True or False Statements : 90% of a radioactive sample is left undecayed after time t has elapsed, percentage of the initial sample which will decay in a total time 2t is 19%.

Ninety precent of a radoactive sample is left over after a time interval t. The percentage of initial sample that will disntegrate in an interval 2t is-

It is observed that only 6.25% of a given radioactive sample is left undecayed after a period of 16 days. What is the decay constant of this sample in day^-1 ?

A radioactive sample is decayed 20% in one day. After next two days, the undecayed percentage of nuclei will be

A radioactive sample is decayed 20% in one day. After next two days, the undecayed percentage of nuclei will be

What percentage of the atoms in a sample will remain undecayed in a time equal to mean life ?

A radioactive sample remains undecayed 9/16 after time t.How much sample remains undecayed after time t/2

A radioactive sample remains undecayed 9/16 after time t.How much sample remains undecayed after time t/2

In a sample of radioactive material, what percentage of the initial number of active nuclei will decay during one mean life ?