โ™ป๏ธap environmental science review

Ammonium (NH4)

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

Ammonium is a positively charged ion composed of one nitrogen atom bonded with four hydrogen atoms. It is commonly found in fertilizers and plays a vital role in the nitrogen cycle.

AP course connection

Topic 7.1: 7.1 Introduction to Air Pollution

Unit 7

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