STANDARD Physics Energy Levels MCQ Question
A hydrogen atom and a Li⁺⁺ ion are both in the second excited state. If lₕ and lₗᵢ are their respective electronic angular momenta and Eₕ and Eₗᵢ their respective energies, then
lₕ > lₗᵢ and |Eₕ| > |Eₗᵢ|
lₕ = lₗᵢ and |Eₕ| > |Eₗᵢ|
lₕ = lₗᵢ and |Eₕ| < |Eₗᵢ|
lₕ < lₗᵢ and |Eₕ| < |Eₗᵢ|
Correct Answer
Detailed Explanation
In the second excited state, both have the same angular momentum (l = 2ħ). However, the energy levels depend on the nuclear charge, so |Eₕ| < |Eₗᵢ| because Li⁺⁺ has a higher nuclear charge.
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