Glossary · term

Isotope

Nuclear & Particle

Aliases
isotopes
Domain
Nuclear & Particle

Definition

Atoms of one element with different numbers of neutrons — same chemistry, different mass and sometimes different stability. Uranium-235 fissions; uranium-238 mostly does not.

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From the Glossary database in Notion, last edited 2026-08-17. This page is the row, rendered by the build; nothing on it is written by hand.