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Hydrogen Ions

Written by the Fiveable Content Team โ€ข Last updated August 2025
Verified for the 2027 exam
Verified for the 2027 examโ€ขWritten by the Fiveable Content Team โ€ข Last updated August 2025

Definition

Hydrogen ions (H+) are single proton with no electrons and play crucial roles in chemical reactions, especially those involving acids and bases.

AP course connection

Topic 3.3: 3.3 Cellular Energy

Unit 3

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Hydrogen Ions Definition for AP Biology | Fiveable