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Lecture

Quantum Numbers.docx

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Department
Chemistry
Course
CHEM 1A
Professor
Amanda Brindley
Semester
Fall

Description
Quantum Numbers Describes the distribution of electrons. The combination of them all specifies the wavefunction. You can think of it as an address to an electron Analogy: Finding Person on Campus Building number 403 Room number 1100 Row FChair 1 Male or Female Quantum numbers n l m m l s Quantum Number- Principle Quantum Number ______________________- “n” Can have any positive integer. Principle quantum number Bohr number We saw this in the ____________ as the energy ?▯?? ▯ ▯▯▯▯ ▯▯▯ ▯▯▯ ▯▯▯ ▯ Quantum Number-Angular Momentum Quantum Number Angular Momentum Quantum Number- “l” Distinguishes the orbitals of different shape. Values have letters associated with them. 0=s, 1=p, 2=d, 3=f, 4=g,........ These are associated with the atomic orbitals we just discussed. Can be any integer from 0 to n-1. Question: For the 4 th energy shell, what are the orbitals present? n allowed values of l 1 2 3 4 Quantum Numbers- Magnetic Quantum Number Magnetic Quantum number- “m ” (read l as m sub l) Distinguishes orbitals that have same n and l (same energy and shape) but having a different orientation. Allowed values are from –l...0...l Table of Allowed Value
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