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Per NCERT §2.6.3, in a MULTI-electron atom the energy of an orbital depends on which quantum numbers (under the (n + l) rule)?
AOnly l
BOnly n
CBoth n and l: lower (n + l) means lower energy; on a tie, smaller n wins
DOnly m_l
Answer & Solution
Correct answer: C. Both n and l: lower (n + l) means lower energy; on a tie, smaller n wins
Per NCERT §2.6.3, multi-electron orbital energy follows (n+l) rule: smaller (n+l) → lower E; tie broken by smaller n. (For H alone it depends only on n.)
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