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  2. Spin quantum number - Wikipedia

    en.wikipedia.org/wiki/Spin_quantum_number

    The phrase spin quantum number refers to quantized spin angular momentum. The symbol s is used for the spin quantum number, and m s is described as the spin magnetic quantum number [3] or as the z-component of spin s z. [4] Both the total spin and the z-component of spin are quantized, leading to two quantum numbers spin and spin magnet quantum ...

  3. Magnetic quantum number - Wikipedia

    en.wikipedia.org/wiki/Magnetic_quantum_number

    The spin magnetic quantum number m s specifies the z-axis component of the spin angular momentum for a particle having spin quantum number s. For an electron, s is 1 ⁄ 2 , and m s is either + 1 ⁄ 2 or − 1 ⁄ 2 , often called "spin-up" and "spin-down", or α and β.

  4. Quantum number - Wikipedia

    en.wikipedia.org/wiki/Quantum_number

    In quantum physics and chemistry, quantum numbers are quantities that characterize the possible states of the system. To fully specify the state of the electron in a hydrogen atom, four quantum numbers are needed. The traditional set of quantum numbers includes the principal, azimuthal, magnetic, and spin quantum numbers. To describe other ...

  5. Spin (physics) - Wikipedia

    en.wikipedia.org/wiki/Spin_(physics)

    where S z is the spin component along the z axis, s z is the spin projection quantum number along the z axis. One can see that there are 2s + 1 possible values of s z. The number "2s + 1" is the multiplicity of the spin system. For example, there are only two possible values for a spin-⁠ 1 / 2 ⁠ particle: s z = + ⁠ 1 / 2 ⁠ and s z = − ...

  6. Hund's rules - Wikipedia

    en.wikipedia.org/wiki/Hund's_rules

    The boxes represent different magnetic quantum numbers. As an example, consider the ground state of silicon . The electron configuration of Si is 1s 2 2s 2 2p 6 3s 2 3p 2 (see spectroscopic notation ).

  7. List of equations in quantum mechanics - Wikipedia

    en.wikipedia.org/wiki/List_of_equations_in...

    The general form of wavefunction for a system of particles, each with position r i and z-component of spin s z i. Sums are over the discrete variable s z , integrals over continuous positions r . For clarity and brevity, the coordinates are collected into tuples, the indices label the particles (which cannot be done physically, but is ...

  8. Electron magnetic moment - Wikipedia

    en.wikipedia.org/wiki/Electron_magnetic_moment

    In atomic physics, the electron magnetic moment, or more specifically the electron magnetic dipole moment, is the magnetic moment of an electron resulting from its intrinsic properties of spin and electric charge. The value of the electron magnetic moment (symbol μ e) is −9.284 764 6917 (29) × 10 −24 J⋅T −1. [1]

  9. Spin-1/2 - Wikipedia

    en.wikipedia.org/wiki/Spin-1/2

    Spin-⁠ 1 / 2 ⁠ particles can have a permanent magnetic moment along the direction of their spin, and this magnetic moment gives rise to electromagnetic interactions that depend on the spin. One such effect that was important in the discovery of spin is the Zeeman effect , the splitting of a spectral line into several components in the ...