What Is Atomicity?

Atomicity can be defined as the total number of atoms that composes a molecule. Simply put, it is the no of atoms present in a molecule. For example, each molecule of oxygen is composed of two oxygen atoms. So atomicity of oxygen is 2. In older contexts, atomicity is sometimes synonymous with valency.

Examples:

  • Inert gases like helium, neon etc are monoatomic
  • Hydrogen, Oxygen is diatomic
  • Ozone is triatomic
  • Phosphorus(P4) is tetratomic

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