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atomAn atom is the basic building block of matter.
An atom is the basic building block of matter.The smallest unit of a chemical element, made up of protons, neutrons, and electrons.
Every atom has a nucleus at its center.
Every atom has a nucleus at its center.Atoms combine to form molecules.
Atoms combine to form molecules.The air we breathe is made up of different types of atoms.
The air we breathe is made up of different types of atoms.atom structure
atom structureatom model
atom modelatom theory
atom theoryparticle
molecule
element
