6.4 Quantum Numbers

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Video Transcript
In this lesson you will learn:

-The name, meaning, and range of possible values for the 4 quantum numbers

1. The Principal quantum number (n)

2. The Azimuthal quantum number (l)

3. The Magnetic quantum number (ml)

4. The Spin quantum number (ms)

-A description/explanation of the Pauli Exclusion Principle


Quantum Numbers

The following table summarizes the name, meaning, and range of possible values for each of the quantum numbers.

NAME MEANING RANGE
n Principal Shell Number [1...∞]
l Azimuthal Subshell (Type of Orbital) [0...(n-1)]
ml Magnetic Orientation in Space [-l...+l]
ms Spin Spin Up or Spin Down +1/2 or -1/2

Pauli Exclusion Principle

The Pauli Exclusion Principle states that no two electrons in an atom can have the same set of four quantum numbers.  Ultimately, this means that you can't have two electrons in the same orbital with the same spin.