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not considering the electronic spin the deggenercy of the degeneracy of the second excited state of `H^(-)` is :

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not considering the electronic spin the deggenercy of the degeneracy of the second excited state of `H^(-)` is :
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degaenargy = 9 for H- atom because 3s=3p =3d ltbr. For `H^(-)` 1slt 22slt2p lt3s
last excited state 2s
2nd excited sate 2p
Hence , degeneracy of 2nd excited state =3
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