🧲ap physics 2 review

Mass Defect

Written by the Fiveable Content Team • Last updated August 2025
Verified for the 2026 exam
Verified for the 2026 examWritten by the Fiveable Content Team • Last updated August 2025

Definition

Mass defect refers to the difference in mass between a nucleus and its individual protons and neutrons. It is caused by the conversion of some mass into binding energy during the formation of the nucleus.

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