Home › NEET UG › Chemistry › Atomic combinations › Hund's rule states that electrons in degenerate …
Hund'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.
Related questions
The strength of a bond depends chiefly on the extent of:Sidewise overlapping produces charged clouds shaped like a:In a pi bond, the axes of the overlapping orbitals remain:Head-on overlap along the internuclear axis is also called:A sigma bond is formed by overlap that is:In a molecule such as HF, the covalent bond is:A bond where the electron pair sits exactly between identical nuclei is:The nitrogen bond enthalpy of 946 kJ per mol is one of the: