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Atomic radius

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Summary
The horizontal rows of the table are called periods and each of their elements have the same number of electron shells. The columns (groups or families) contain elements that have the same number of electrons in their outermost shell, which results  in  very similar  chemical properties. Some of these groups are highlighted.
The atomic radius is a periodic property.
Learning objectives
  • To observe the periodicity of atomic radii. 
  • How to use the animation
    Rollover the element to see their names and atomic radii.
    Keywords
    atom, radius, Mendeleev, periodic-table, element, alkaline
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