Radioactivity of `108` undecayed radioactive nuclei of half life of `50` days is equal to that of `1.2 xx 108` number of undecayed nuclei of some material with half life of `60` days Radioactivity is proportional to half-life.
A
If both assertion and reason are true and the reason is the correct explanation of the assertion
B
If both assertion and reason are true but reason is not the correct explanation of the assertion
A radioactive sample of half life 10 days contains 1000X nuclei. Number of original nuclei present after 5 days is
80% of the radioactive nuclei are left undecayed in one day then % of nuclei left undecayed after two days will be:
Radioactivity||Mean Life|| Half Life
At a given instant, there are 25% undecayed radioactive nuclei in a sample. After 10 seconds the number of undecayed nuclei reduces to 12.5%, the mean life of the nuclei is
A saample of radioactive elements contains 4xx10^(16) active nuclei. If half-life of element is 10 days, then the number of decayed nuclei after 30 days is
