PUBLIC MARKS with tags msvt & chemistry

In the 19th century Dmitri Mendeleev organized the known elements by their characteristics and atomic weights. His creation evolved into what we now call the periodic table. We use it regularly, but what would it be like to construct that model from scratch? What if you had to group elements by their characteristics and place them on a table close to the other elements in their group, while at the same time logically arranging the atomic weights? What decisions would you make? What would it be like... to be Mendeleev?

The pH Factor is designed as a resource to help elementary and middle school teachers introduce acids and bases to their students. Materials are organized using a conceptual framework called the Seven E's: Excite, Explore, Explain, Expand, Extend, Exchange, and Examine. This model can be used in a linear fashion or each E can stand alone. Each E contains an intercactive screen and lesson plans. The interactive screens can be used directly in the classrooms, either with individual students or groups. The lesson plans are designed to be read by teachers and modified to fit their specific classroom needs. From the Miami Museum of Science-