Radio Activity

If a meristematic cell is placed in a medium containing radio active thymidine, radioactivity will be first observed in :-

Radio active wastes at lower doses cause

Radio active carbon- 14 , in a wood sample decays with a half life of 5700 years. The fraction of the radio active carbon -14, that remains after a decay period of 17,100 year is

The half life period of radio active isotope is 5 minutes. The fraction of isotope, that will be remaining after 30 minutes is

A trace element, also required for plant growth, and in the form of radio active isotope useful in cancer therapy is

3 ruthuerfords of a radio active isotope of half-life equal to 3 days was received after 12 days. Initial isotope packed was