Q. Regarding the atom of a chemical element, magnetic quantum number refers to?

A
Orientation
B
Shape
C
Size
D
Spin
Solution:

In atomic physics, the magnetic quantum number is the third in a set of four quantum numbers (the principal quantum number, the azimuthal quantum number, the magnetic quantum number, and the spin quantum number) which describe the unique quantum state of an electron. The magnetic quantum number distinguishes the orbitals available within a subshell, and is used to calculate the azimuthal component of the orientation of orbital in space.

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