Atom vs Particle

When to use each in English, with meaning, register, and examples.

 AtomParticle
MeaningThe smallest part of a substance.A small piece of something.
Usage notesUse 'atom' in scientific contexts. Not common in everyday conversation unless discussing science or chemistry.Used in scientific contexts to describe tiny units of matter. Avoid in casual conversations unless speaking about science.

Frequently asked questions: Atom vs Particle

What's the difference between "Atom" and "Particle"?

"Atom" means: The smallest part of a substance. "Particle" means: A small piece of something.

When should I use "Atom" and "Particle"?

They can all be used in everyday English.