Key term for AQA GCSE Chemistry, used in Atomic Model and Isotopes.
Specific regions at fixed distances from the nucleus where electrons are found; also known as electron shells.
Energy levels appears in AQA GCSE Chemistry revision content for Atomic structure and the periodic table, especially Atomic Model and Isotopes and Electronic Structure.
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Atomic structure and the periodic table
Atomic Model and Isotopes • History of the Atomic Model
