The count rate of `10 g` of radioactive material was measured at different times and times has been shown in the figure. The half-life of material and the total counts (approximately) in the first half life period, respectively are.
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The count rate for 10 g of radioactive material was measured at different times and this has been shown in the above graph with scale given. The half-life of the material and the total count in the first half-value period, respectively are.

A radioactive material has an initial amount 16 gm After 120 days it reduces to 1 gm . Then the half-life of radioactive material is

Half life of a radioactive material is 3600 years. Calculate the average life

The pressure of a gas decomoposing at the surface of a solid catalyst has been measured at different times and the results are given below : Determine the order of reaction, its rate constant and half life period.

The decay constant of a radioactive material is 5 xx 10^(-4) per year.find its half-life period.

For a certain radioactive process the graph between In R and t(sec) is obtained as shown in the figure. The the value of half life for the unknown radioactive material is approximately:

The half life period of a radioactive material is 15 minutes. What percent will remain after 45 minutes ?

Define Half-life of radioactive material. Derive an expression for half-life period