Radioactive isotopes are used in various fields such as scientific research, agriculture, industry, medicine, food preservation, etc.
For example:
∙ Tritium is used in manufacturing hands of the clocks as it is visible in dark due to its lumniscense property.
∙ Strontium-89 is used in the treatment of bone cancer.
∙ Cobalt-60 is used for food preservation.
∙ Iodine 123 is used to cure hyperthyroidism.