Spin Quantum Number
| Formula / Notation | ms = +1/2 or -1/2; Pauli: no two e⁻ same 4 QN |
|---|---|
| Also Known As | ms, electron spin, spin angular momentum quantum number |
What is Spin Quantum Number?
The quantum number (ms) that describes the intrinsic angular momentum (spin) of an electron, with values of +½ (spin up ↑) or -½ (spin down ↓). The Pauli exclusion principle requires that two electrons in the same orbital have opposite spins.
Formula & Notation
Other Names / Synonyms: ms, electron spin, spin angular momentum quantum number
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
The quantum number (ms) that describes the intrinsic angular momentum (spin) of an electron, with values of +½ (spin up ↑) or -½ (spin down ↓). The Pauli exclusion principle requires that two electrons in the same orbital have opposite spins.
Electron spin is exploited in magnetic resonance imaging (MRI) and electron spin resonance (ESR) spectroscopy. Spin states of electrons are fundamental to understanding magnetic properties of materials. Quantum computing uses spin states as qubits for information processing.
Spin quantum number is a theoretical quantum mechanical concept. MRI machines that exploit nuclear spin use strong magnetic fields requiring exclusion of ferromagnetic objects from the scanner room.
The formula or notation for Spin Quantum Number is: ms = +1/2 or -1/2; Pauli: no two e⁻ same 4 QN