Radioisotopes are different species of the same chemical atom which varies in atomic masses but have the same atomic number. They have an unstable nucleus which results in the release of excess energy in the form of gamma, beta and alpha rays.
Importance of radioisotopes:
- Radio active elements are used in determining the age of the planet and other fossils discovered by radiometric dating.
- The radioactive elements have a special feature of breaking down over time with a constant rate of decay resulting in the geological evidence of ages which can be determined by the half-life of radioactive substances.
Therefore, radioactive isotopes are important in determining the age of the earth.
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