Atom

usgb/ˈætəm/
noun

The smallest unit of a chemical element that still keeps its properties.

An oxygen atom combines with two hydrogen atoms to form a molecule of water.
Visual representation of "atom" - The smallest unit of a chemical element that still keeps its properties
Definition 1 of 3
Visual representation of "atom"
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Chemical Composition

Atoms bond together to form molecules, which make up matter.

Illustration for Chemical Composition
Water is composed of hydrogen and oxygen atoms.
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Indivisible Concept

Historically, atoms were thought to be indivisible; now we know they consist of smaller particles.

Illustration for Indivisible Concept
Atoms are made up of protons, neutrons, and electrons.
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Unique Identity

Every element on the periodic table is defined by the number of protons in its atoms.

Illustration for Unique Identity
Carbon atoms have six protons each.
Visual representation of the word "Atom"

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