ChemTalk

Category: Electronic Structure of Atoms

Atomic Spectra

Core Concepts In this tutorial, you will learn about atomic spectra, including the meaning behind this term, why spectra appear the way they do, and

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Periodic table with electron shells

Electron Shells

Core Concepts In this tutorial, you will learn about electron shells, the different subshells, and the orbitals where electrons can be found. Topics Covered in

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Hund’s Rule

What is Hund’s Rule? Hund’s Rule of Maximum Multiplicity, most commonly referred to as Hund’s Rule, states that every atomic orbital within a sublevel is

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Pauli Exclusion Principle

Pauli Exclusion Principle Definition The Pauli Exclusion Principle states that in any atom no electron can have the same four electronic quantum numbers as another

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Aufbau Principle

What is the Aufbau Principle?  The Aufbau principle states that electrons will first fill the lowest energy electron shells in a neutral atom. Electrons fill

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