Chemistry - GENERAL CHEMISTRY Question with Solution | TestHub
ChemistryGENERAL CHEMISTRYIntroduction, Quantum NumberMedium2 minQB
ChemistryMediumsingle choice
Which species has degeneracy 3 in its fourth excited state?
Options:
Answer:
C
Solution:
He⁺, H and Li²⁺ have one electron. Their fourth excited shell is n=5, with orbital degeneracy n²=25, not 3. In the source's simple helium-like sequence, Be²⁺ goes from 1s² through 1s2s, 1s2p, 1s3s to 1s3p. The three p-orbital orientations m_l=-1,0,+1 give the intended degeneracy 3, C. Spin and fine-structure splitting are not counted.
Stream:JEESubject:ChemistryTopic:GENERAL CHEMISTRYSubtopic:Introduction, Quantum Number
⏱ 2mℹ️ Source: QB
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