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GCSE Chemistry · key term
An arrangement of electrons in which the highest occupied energy level is full: 2 electrons for helium or 8 for the other noble gases.
Used by AQA
Specification 4.1.2.4 · Paper 1
Revise: Group 0 Noble GasesA noble-gas atom already has a stable electron arrangement. Helium’s only shell is full with 2 electrons. Every other noble gas has 8 electrons in its outer shell.
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