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Atomic radius

3:47

Periodic Trends: Atomic Radius

3:37

Atomic Size | Atoms and Molecules | Don't Memorise

3:34

Atomic Radius: which atom is smaller? (Examples)

1:36

Understanding Atomic Radius

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Atomic Size | Elements | Chemistry

The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding cloud of electrons. Since the boundary is not a well-defined physical entity, there are various non-equivalent definitions of atomic radius. Three widely used definitions of atomic radius are: Van der Waals radius, ionic radius, and covalent radius.
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  • History 

  • Definitions 

  • Explanation of the general trends 

  • Calculated atomic radii