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FHSST Physics/Atom/Models
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Models of the Atom
Atom center|Model of the atom - 3-D Helium atom - ground state Helium atom modelShowing nucleus with two protons (blue) and two neutrons (red), orbited by two electrons (waves). Classification Smallest recognised division of a chemical element Properties Mass: ≈ 1.66 × 10^-27 to 4.52 × 10^-25 kg Electric charge: zero Diameter: 10 pm to 100 pm See Also A New Model of the Atom for an alternate view of how to understand atomic structure.