Atomic & Molecular Symbols: What Do They Mean?

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SUMMARY

The discussion focuses on atomic and molecular symbols, specifically the terms used to denote atomic orbitals and molecular symmetries. Atomic symbols include S (L=0), P (L=1), and D (L=2), while molecular symbols such as Sigma (Σ) and Pi (Π) are introduced without the quantum number L. The presence of subscripts g (gerade) and u (ungerade) is also highlighted, indicating symmetry properties in molecular orbitals. References to authoritative texts like "Quantum Mechanics" by Landau and Lifgarbagez provide foundational knowledge on these symbols.

PREREQUISITES
  • Understanding of quantum mechanics terminology
  • Familiarity with atomic orbital theory
  • Knowledge of molecular symmetry concepts
  • Basic grasp of notation in chemistry
NEXT STEPS
  • Study the significance of molecular orbital theory in chemistry
  • Explore the role of symmetry in molecular structures
  • Review "Quantum Mechanics" by Landau and Lifgarbagez for deeper insights
  • Learn about the implications of subscripts g and u in molecular orbitals
USEFUL FOR

Chemistry students, educators, and researchers interested in atomic and molecular structure, particularly those focusing on quantum mechanics and molecular symmetry.

filippo
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Atoms have Terms Symbols such as S (L=0), P (L=1), D (L=2), etc...In case of molecules, L no longer exists as other symbols are uesd: which ones?
 
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filippo said:
Atoms have Terms Symbols such as S (L=0), P (L=1), D (L=2), etc...In case of molecules, L no longer exists as other symbols are uesd: which ones?

I often see: Sigma [itex]\Sigma[/itex], Pi [itex]\Pi[/itex], etc. Often with a subscript g or u. The meaning are given in various books. For example, Landau and Lifgarbagez "Quantum Mechanics".
 

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