alleryHund's rule states that electrons in degenerate orbitals:
AAlways pair up first before going alone
BFill singly with parallel spins first, then pair
CChoose any orbital randomly without rule
DAre restricted to s and p orbitals only
Answer & Solution
Correct answer: B. Fill singly with parallel spins first, then pair
**Hund's rule of maximum multiplicity:** electrons in degenerate orbitals (same energy, e.g., 3 p orbitals) fill SINGLY with parallel spins first, then pair up.
**Example:** N (2p³) = ↑ ↑ ↑ in three p orbitals.
Keep practising Structure of Atom
Browse all Structure of Atom questions for AP Intermediate 1st Year, or explore more Chemistry topics.
Related questions
NEET · Chemistry · Quantum NumbersIn the photoelectric effect, the kinetic energy of ejected electrons is:The electronic configuration of Cr (Z=24) is an exception, written as:By the AUFBAU principle, the 3d subshell starts filling:Heisenberg's uncertainty principle is most accurately stated as:The de Broglie wavelength of a particle with momentum p is:The energy of the nth orbit in a hydrogen atom (Bohr's model) is:Isotopes have the SAME number of: