What is Spin quantum number of an Electron

The spin quantum number describes the intrinsic angular momentum of an electron or other particle.

Spin quantum number is proposed by George Uhlenbeck and Samuel Goudsmit.

Reference Source:

[1] Wikipedia Contributors. Spin quantum number. Wikipedia. Published January 2, 2022. Accessed January 9, 2022. https://en.wikipedia.org/wiki/Spin_quantum_number.