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{{Short description|Quantized angular momentum in atomic systems}}
{{Short description|Quantized angular momentum in atomic systems}}


[[Book:Quantum Collection/Matter (by scale)|← Back to Matter by scale]]
{{Quantum matter backlink|Atoms}}


'''Angular momentum''' in an [[Physics:Quantum atoms/atom|atom]] is a quantized physical quantity associated with the motion and intrinsic properties of an [[Physics:Quantum atoms/electron|electron]]. It plays a central role in determining the structure of [[Physics:Quantum atoms/orbital|orbitals]] and the behavior of electrons in atoms.
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'''angular momentum''' is a Book II topic in the Quantum Collection. '''Angular momentum''' in an [[Physics:Quantum atoms/atom|atom]] is a quantized physical quantity associated with the motion and intrinsic properties of an [[Physics:Quantum atoms/electron|electron]]. It plays a central role in determining the structure of [[Physics:Quantum atoms/orbital|orbitals]] and the behavior of electrons in atoms. Angular momentum is represented by operators with quantized eigenvalues and noncommuting components. In atoms it includes orbital angular momentum, spin angular momentum, and their couplings. These quantities determine degeneracies, selection rules, magnetic moments, fine structure, hyperfine structure, and the response of atoms to external electric and magnetic fields.
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[[File:Quantum_atoms_angular_momentum_concept_map.svg|thumb|280px|angular momentum in the Quantum Collection.]]
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<div style="font-size:90%;">Quantization of angular momentum in atomic orbitals.</div>
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Latest revision as of 23:54, 23 May 2026


← Back to Atoms Book II

angular momentum is a Book II topic in the Quantum Collection. Angular momentum in an atom is a quantized physical quantity associated with the motion and intrinsic properties of an electron. It plays a central role in determining the structure of orbitals and the behavior of electrons in atoms. Angular momentum is represented by operators with quantized eigenvalues and noncommuting components. In atoms it includes orbital angular momentum, spin angular momentum, and their couplings. These quantities determine degeneracies, selection rules, magnetic moments, fine structure, hyperfine structure, and the response of atoms to external electric and magnetic fields.

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angular momentum in the Quantum Collection.

Description

In quantum mechanics, angular momentum is described by quantum numbers and is restricted to discrete values. It arises in two forms:

  • orbital angular momentum, associated with the electron’s motion in an orbital
  • intrinsic angular momentum, known as spin

These quantities determine the allowed energy states and spatial distributions of electrons.

Properties

  • quantized values
  • determines orbital shapes
  • linked to energy levels and spectra

See also

Table of contents (217 articles)

Index

Full contents

References


Author: Harold Foppele


Source attribution: Physics:Quantum atoms/angular momentum

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