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This chemistry video tutorial provides a basic introduction into orbitals and quantum numbers. It discusses the difference between atomic energy levels and sublevels found within an atom. Orbitals are locations where it's most probable to find the location of an electron. The principle quantum number n describes the energy level of an orbital in an atom. The angular momentum quantum number l describes the sublevel or shape of an orbital. The magnetic quantum number ml describes the orientation of an orbital. Ms describes the electron spin of an atom. This video explains how to find the four quantum numbers n l ml and ms of an electron given its electron configuration.

Quantum Numbers - Formula Sheet:


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Speed of Light, Frequency, Wavelength:


Photon Energy:


The Photoelectric Effect:


De Broglie Wavelength:


The Bohr Model of Hydrogen:


Heisenberg's Uncertainty Principle:


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Intro to Quantum Numbers:


Orbitals & Atomic Energy Levels:


Maximum Number of Electrons:


Intro to Electron Configuration:


Electron Configuration Exceptions:


Noble Gas Notation:


Electron Configuration of Ions:


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Orbital Diagrams:


Paired & Unpaired Electrons:


Aufbau's Principle & Hund's Rule:


Paramagnetic & Diamagnetic Elements:


Valence Electrons & Periodic Table:


Effective Nuclear Charge:


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Slater's Rule:


How To Identify The Element:


Quantum Numbers - Mega Review:


Quantum Numbers - Practice Test:


Final Exams and Video Playlists:


Full-Length Videos and Worksheets:

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