Definition

1. Adjective:
   • Relating to or consisting of molecules composed of more than two atoms: The term describes entities, typically molecules or ions, that contain multiple atoms. It is a scientific term used primarily in chemistry and physics.

Usage

• The word "polyatomic" is used as an adjective to modify nouns such as "ion," "molecule," or "species." It is a technical term common in scientific writing and discourse.
• Example: "Ozone (O₃) is a polyatomic molecule." (This describes ozone as a molecule made of three atoms.)
• Example: "Sulfate (SO₄²⁻) is a common polyatomic ion." (This describes sulfate as an ion consisting of multiple atoms.)

Examples

• Scientific Context:
  • Water (H₂O) is a simple polyatomic molecule.
  • Ammonium (NH₄⁺) is a positively charged polyatomic ion.
  • The reaction involves several polyatomic species.

Advanced Usage

• "Polyatomic gases": Gases whose molecules consist of more than two atoms.
  • Nitrogen dioxide (NO₂) is an example of a polyatomic gas.
• "Polyatomic ion": A charged species composed of two or more atoms covalently bonded together.
  • Carbonate (CO₃²⁻) is a polyatomic ion found in many minerals.

Variants and Related Words

• Monatomic (adj): Consisting of single atoms. (e.g., Helium is a monatomic gas.)
• Diatomic (adj): Consisting of two atoms. (e.g., Oxygen (O₂) is a diatomic molecule.)
• Polyatomicity (n): The state or property of being polyatomic. (This is a less common derived noun.)

Synonyms

• Multiatomic: Having or involving many atoms. (Note: "Polyatomic" is the standard and more common term in scientific literature.)

Antonyms

• Monatomic: Consisting of a single atom.
• Diatomic: Consisting of two atoms.

Adjective

1. of or relating to a molecule made up of more than two atoms