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Whose discovery identified isotopes as atoms of the same element with different masses?

Quick Answer

Frederick Soddy’s. He explained in the early 1900s that isotopes share atomic number but differ in mass.

The Full Story

Frederick Soddy developed the concept of isotopes in the early 20th century while studying radioactive substances. He showed that atoms of the same element can have different masses because they contain different numbers of neutrons. This explained why some elements occur in multiple forms without changing their chemical identity. The isotope concept became essential for nuclear chemistry, geochronology, medicine, and many other fields.

Key Facts

1.Early 1900s: Soddy developed the isotope idea
2.Isotopes have the same atomic number
3.Different isotopes can have different stability and half-lives

YouTube Angle

Suggested video title for this topic:

"The hidden twin versions of every element"

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