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Structure of the Atom

Related Article: Learn more about atoms.

Ernest Rutherford conducted an experiment to learn the structure of an atom.

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Structure of the Atom (1:55)

Ernest Rutherford conducted an experiment to learn the structure of an atom.

Niels Bohr's Atomic Model (1:24)

According to Bohr’s atomic model, electrons travel only in fixed paths, called energy levels, around the nucleus.

Size of Atoms: Matter (1:04)

Matter is mostly empty space because atoms themselves are mostly empty space.

Atomic Structure: The Nucleus (0:52)

The nucleus contains protons, which are positively charged, and neutrons. Each proton has a mass of about 1 amu.

Atomic Structure: Neutrons (0:33)

The neutron has no electric charge, is found in the nucleus, and has a mass of ~1 amu.

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