Answer:
12 orbitals
Explanation:
The suborbital = d orbital.
n = 4
The orbital is 4d.
There are 5 degenerate orbitals of d orbitals. Thus m value, -2, -1, 0, +1, +2 .
Thus, number of orbitals = 5
The suborbital = f orbital.
n = 4
The orbital is 4f.
There are 7 degenerate orbitals of f orbitals. Thus m value, -3, -2, -1, 0, +1, +2, +3
Thus, number of orbitals = 7
Total number of orbitals = 7 + 5 = 12
In the n = 4 shell of a hydrogen atom, there are a total of 12 d and f orbitals.
The 4d sub-level has a set of 5 degenerate orbitals. Similarly, the 4f sub-level has a set of 7 degenerate orbitals.
This implies that the number of d and f orbitals in the n=4 level of hydrogen =
5 + 7 = 12
There are a total of 12 d and f orbitals total are present in the n = 4 shell of a hydrogen atom.
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