For `Be^(3+)` ion, the degeneracy of the `3rd` enegry level is equal to
A
nine
B
six
C
three
D
seven
Text Solution
Verified by Experts
The correct Answer is:
A
Degeneracy is equal to the number of orbitals that have the same enegry. Different subshells of a particular shell have different energues in case of multi-electron atoms. However, in `H` atom or `H-`like ion such as `Be^(3+)`, these have the same enegry. Thus,`3s, 3p_(x),3p_(y),3p_(z),3d_(xy),3d_(xz),3d_(yz),3d_(x^(2)-y^(2))`, and `3d_(z^(2))` all possess the same enrgy.
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