Atomic Structure and Electron Configuration

AP Chemistry· difficulty 2/5

The Pauli exclusion principle says that

A
$Electrons cannot occupy s orbitals$
B
$Two electrons can have identical quantum numbers in an atom$
C
$Pairing is forbidden$
D
$No two electrons in an atom can have the same set of four quantum numbers$
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Explanation

Each orbital holds at most two electrons (with opposite spin quantum numbers).

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