What are isotopes and how many are there

The video tutorial explains isotopes, which are variants of chemical elements with different neutron numbers. It uses carbon as an example, detailing carbon-12, carbon-13, and carbon-14 isotopes. Carbon-14's instability makes it useful for radiocarbon dating, a method developed by Willard Libby. The video also covers the history of isotopes, mentioning Frederick Soddy, and discusses the applications of isotopes in medicine and other fields. The concept of half-life is introduced, explaining how it helps determine the age of materials.

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