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atoms
normally have no charge
are made of ions and electrons
are the smallest unit of matter
are made of electrons, protons, and neutrons

Atoms are made of electrons, protons, and neutrons.

Atoms consist of electrons surrounding a nucleus that contains protons and neutrons. Neutrons are neutral, but protons and electrons are electrically charged. Protons have a relative charge of +1, while electrons have a relative charge of -1. The number of protons in an atom is called its atomic number

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