The 3d energy level in hydrogen has how many distinct states with different values of the quantum number m

The question is incomplete, the complete question is;

The 3d energy level in hydrogen has how many distinct states with different values of the quantum number m?

A. 3

B. 5

C. 6

D. 2

E. 4

B. 5

Explanation:

The magnetic quantum number is used in describing the actual orientation of orbitals in space. The name 'magnetic quantum number' was coined because it describes the effect of different orientations of orbitals which was initially observed in the presence of an external magnetic field.

The d orbital can exhibit five orientations corresponding to five values of the magnetic quantum number, these are; -2,-1,0,1,2 hence the answer above.

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