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CGP EDU Academic Team
Published on: August 13, 2026
NUMERIC RESPONSE
Not considering electronic spin, the degeneracy of second excited state 
of H atom is 9 , while the degeneracy of fourth excited state of hydride ion 
is .
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NUMERIC RESPONSE
(3) According to Aufbau rule, for 
(miltiectronic system) the fourth excited state will be 3 p.
has three orbital of equal energy i.e., 
.
So, degeneracy of 
Three
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