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What is the maximum degeneracy of a leve...

What is the maximum degeneracy of a level of H-atom, where `e^(-)` has energy, `E_(n) =- (R)/(9)`?

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Degeneracy of any level is the total number of orbitals present in that level
Energy of nth level in terms of `R_(H)` is given by `E_(H) = - (R_(H)Z^(2))/(n^(2))`
Here `- (R_(H)Z^(2))/(n^(2)) = - (R_(H))/(9)` for H-atom, Z =1, therfore, n=3, third level (shell) has 9 orbitals (one s + three p + five d), hence degeneracy is nine.
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