A) 3s, 3p and 3d orbitals all have the same energy.
B) 3s and 3p orbitals are of lower energy than 3d orbital.
C) 3p orbital is lower in energy than 3d orbital.
D) 3s orbital is lower in energy than 3p orbital.
Correct Answer: A
Solution :
In one electron species, such as H-atom, the energy of orbital depends only on the principal quantum number, n. Hence option [d] i.e., \[1s<2s=2p<3s=3p=3d<4s=4p=4d=4g\]
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