Not considering the electronic spin, the degeneracy of the second excited state (n=3) of H atom is 9, while the degeneracy of the second excited state of H^- is

JEE Advanced 2015 Chemistry question

Chemistry Structure of Atom JEE Advanced 2015

Not considering the electronic spin, the degeneracy of the second excited state () of H atom is 9, while the degeneracy of the second excited state of is

Answer: 3

Solution

is a two-electron species, so the energy of an orbital depends on both and (the and levels are no longer degenerate). Ground state: ; first

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Question ID VK-026389