What Are Radioactive Isotopes?

The video explains why some isotopes are radioactive, focusing on the role of protons and neutrons in atomic nuclei. It discusses how isotopes differ in neutron numbers, affecting nuclear stability. Radioactive isotopes, or radioisotopes, undergo decay to reach stability. The video highlights the use of radioisotopes in medicine, such as tracers and cancer treatment, and concludes with a summary of key points about isotopes and their significance in science.

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