Final answer:
Ammonium, sulfate, and nitrate are examples of polyatomic ions, which are charged particles composed of two or more atoms bonded together.
Step-by-step explanation:
Ammonium, sulfate, nitrate, etc., are examples of polyatomic ions. Polyatomic ions consist of two or more atoms bonded together that collectively bear a charge. For instance, the ammonium ion (NH4+) is a polyatomic cation, while sulfate (SO42-) and nitrate (NO3-) are polyatomic anions. Most polyatomic ions contain oxygen and are known as oxyanions, such as sulfate and nitrate ions. Oxyanions have a specific naming convention, where the one with more oxygen atoms is named with the suffix -ate (e.g., sulfate), and the one with fewer oxygen atoms is named with the suffix -ite (e.g., sulfite).
Remember, polyatomic cations generally end with 'ium' and polyatomic anions typically end with 'ide', except in the case of oxyanions.