The magnetic quantum number tells us how many orbitals there are in a subshell and the possible orientations of these orbitals. Its value is dependent on the angular momentum quantum number, l. The shell that an electron occupies is defined by the principal quantum number or the first quantum number.Click to see full answer. Also question is, what does the magnetic quantum number ml refer to?Magnetic Quantum Number (ml): ml = -l, , 0, , +l. Specifies the orientation in space of an orbital of a given energy (n) and shape (l). This number divides the subshell into individual orbitals which hold the electrons; there are 2l+1 orbitals in each subshell.Additionally, what is the magnetic spin quantum number? The Spin Quantum Number (ms) describes the angular momentum of an electron. An electron spins around an axis and has both angular momentum and orbital angular momentum. If there are two electrons in the same orbital, it will spin in opposite directions. Keeping this in consideration, what are the 4 quantum numbers? In atoms, there are a total of four quantum numbers: the principal quantum number (n), the orbital angular momentum quantum number (l), the magnetic quantum number (ml), and the electron spin quantum number (ms).Who discovered the magnetic quantum number?The Magnetic Quantum Number (signified by mℓ): this quantum number was also discovered by Sommerfeld in the same 1914-1915 time frame. I don’t think he discovered one and then the other, I think that him realizing the need for two runs somewhat together.

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