Castilla Y León PAU Chemistry Practice Questions - Castilla Y León PAU Chemistry (Química 2o Bachillerato) Exam

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According to Hund's rule of maximum multiplicity, how do electrons populate degenerate 2p orbitals in a ground-state carbon atom (Z = 6)?

They pair up in a single 2p orbital with antiparallel spins. They occupy two separate 2p orbitals with parallel spins. They occupy two separate 2p orbitals with antiparallel spins. They enter the 3s orbital before filling the 2p subshell.

Correct Answer:

They occupy two separate 2p orbitals with parallel spins.

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