Definition of "atom"

Kid-friendly meaning of atom, with part of speech, syllables, and example sentences for grades K-2, 3-5, and 6-8.

What does "atom" mean?

atom (noun) — the smallest building block of everything around us.

Part of speechNoun Syllables2 (at·om)

Example sentences using "atom"

Grade K–2
An atom is tiny.
Grade 3–5
Every atom is so small that millions could fit on the tip of a single hair.
Grade 6–8
An atom is mostly empty space, with a tiny dense nucleus and even tinier electrons whizzing around it, which means everything we touch is really organized emptiness.

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