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Atom Definition and Explanation PDF | Download eBooks

Learn Atom definition in biology with explanation to study “What is Atom”. Study atom explanation with biology terms to review biology course for online degree programs.

Atom Definition:

  • An atom is the smallest unit of matter that still retains the properties of an element.

    Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson

Atom Explanation:

An atom is the smallest unit of all ordinary matter. It has the properties of a chemical element. All matter including solid or liquid or gaseous matter is made up of arrangements of atoms either charged or uncharged. The size of the atoms is very small and usually is as big as 100 picometers.

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