Advanced Higher Chemistry Practice Questions - Scottish Advanced Higher Chemistry (C813 77) Exam

According to Hund's rule, electrons in a 2p subshell occupy orbitals so that:

they singly occupy each orbital with parallel spins before pairing they pair up in the lowest-energy orbital first they pair up with opposite spins in the first orbital two electrons enter the same orbital before the others are filled

Correct Answer:

they singly occupy each orbital with parallel spins before pairing

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