Carbon dating and chemistry
For example, if we wish to determine the age of rock containing U (half life = 4.5 x 109 years), we measure the ratio of the concentrations of U and its end product Pb.
We assume that the rock did not contain any lead isotope initially.
Also the chemical properties of isotopes of a given element are identical.
This makes it possible to incorporate a small amount of radioisotopes in a system and trace the fate of particular element or a compound in a series of chemical or physical changes.
The basis of such a treatment is, that the radiation tend to destroy cancerous cells more easily than the normal cells.At the point of crack or leakage, the detector will show high level of radiations.Although the nuclear radiations are quite useful to mankind, yet they are on~ of the major causes of atmospheric pollution.(b) Radioactive isotopes can be used to detect any leakage in underground pipes carrying oils, gas or water.To check the point of leakage a small quantity of compound of radioactive isotope is introduced at the starting place and the detector is moved along the pipe.