Atomic Structure, History of the Atom

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O

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Cl

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Slide 20

Summary

The Atomic Number of an atom = number of

protons in the nucleus.

The Atomic Mass of an atom = number of

Protons + Neutrons in the nucleus.

The number of Protons = Number of Electrons.

Electrons orbit the nucleus in shells.

Each shell can only carry a set number of electrons.