Template:Infobox atom

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Template:Infobox atom
Atom
Helium atom ground state.
Helium atom ground state.
A drawing of the helium atom, showing the nucleus (pink) and the electron cloud (black). The nucleus is made of two protons (red) and two neutrons (violet). The black bar is one angstrom (10−10 m or 0.1 nm).
Properties
Mass range1.67×10−27 to 4.52×10−25 kg
Diameter range62 pm (He) to 520 pm (Cs) (data page)
ComponentsElectrons and a compact nucleus of protons and neutrons

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