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TrendsTube® Teaching Aid
For use with any trends lesson the TrendsTube® has the following properties:

          1. Main Group elements only are shown,
          2. alkaline Metals and Halogens are found just an element apart,
                    an electronegativity teaching aid,
          3. periods connected to others before and after, and
          4. trend identity/name is positioned at the greatest
                    rather than the least of the property.

The TrendsTube® has it's best application when describing the valence concept.
Alexander 2014

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last update 3/17/16