GOB Chemistry

Learn the toughest concepts covered in your GOB - General, Organic, and Biological Chemistry class with step-by-step video tutorials and practice problems.

Atoms and the Periodic Table

The Electron Configuration (Simplified)

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The electron configuration of an element is the distribution of its electrons within atomic orbitals.

The Electron Configuration

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The Electron Configuration (Simplified) Concept 1

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The Electron Configuration (Simplified) Example 1

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Problem

Which electron configuration represents a violation of Hund’s Rule? 

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The Electron Configuration (Simplified) Concept 2

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The Electron Configuration (Simplified) Concept 3

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The Electron Configuration (Simplified) Example 2

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Problem

Which electron configuration represents a violation of the Auf Bau Principle? 

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Problem

Identify the element with the given electron orbital diagram. 

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Problem

Write the electron configuration and electron orbital diagram for the following element:

Sulfur   (Z = 16)

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Problem

Write the ground state electron configuration for the following element:

Magnesium   (Z = 12)  

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The Electron Configuration (Simplified) Concept 4

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The Electron Configuration (Simplified) Example 3

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Problem

Which of the following atoms has no unpaired electrons?

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Problem

Which of the following atoms has the most unpaired electrons?