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Chemistry  /  Chem 0819  ·  Atom · ~20 seconds

Orbit Versus Orbital

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An orbit is a fixed path, Bohr's term; an orbital is a probability region with no fixed path, used by the quantum model.

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Textbooks describe hydrogen's electron as occupying the 1s orbital, never the 1s "orbit," once the quantum model replaces Bohr's picture.

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Using "orbit" and "orbital" interchangeably imports Bohr's fixed-path picture into a model that replaced it with probability.

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