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Chemistry - GENERAL CHEMISTRY Question with Solution | TestHub

ChemistryGENERAL CHEMISTRYIntroduction, Quantum NumberMedium2 minQB

ChemistryMediumnumerical

Passage / Comprehension

Degeneracy is defined as number of orbitals having same energy in a shell or subshell depending on electronic configuration of atom or ion. (Assuming absence of external electric & magnetic field)

Value of degeneracy of $2^{nd}$ excited state of $Li^{+}$ is $____$ .

Answer:

3.00

Solution:

Li⁺ is a multi-electron system containing 2 electrons. Its ground state configuration is $1 s^{2}$ , the $1^{s} t$ excited state is $1 s^{1} 2 s^{1}$ , and the $2^{n} d$ excited state is $1 s^{1} 2 p^{1}$ . In multi-electron systems, degeneracy is determined by the subshell because only orbitals within the same subshell share the same energy. Since the $2 p$ subshell consists of 3 orbitals ( $2 p_{x}, 2 p_{y}, 2 p_{z}$ ), the degeneracy of this state is 3.

Stream:JEESubject:ChemistryTopic:GENERAL CHEMISTRYSubtopic:Introduction, Quantum Number

⏱ 2mℹ️ Source: QB

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