Written by the Fiveable Content Team • Last updated August 2025
Written by the Fiveable Content Team • Last updated August 2025
Definition
Isotopes are variants of a particular chemical element which differ in neutron number, while having the same number of protons. They possess unique masses but exhibit similar chemical properties.
AP course connection
Topic 2.1: 2.1 Elements and Atoms: The Building Blocks of Matter