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Reinventing the Table An earth scientist has rejigged
the periodic table to make chemistry simpler to teach to students. (46) But Bruce Railsback from the University of
Georgia3 says he is the first to create a table that breaks with tradition and
shows the ions of each element rather than just the elements
themselves. "I got tired of breaking my arms trying to explain
the periodic table to earth students," he says, criss-crossing his hands in the
air and pointing to different bits of a traditional table. (47)
But he has added contour lines to charge density, helping to explain
which ions react with which. "Geochemists just want an intuitive
sense of what’s going on with the elements," says Albert Galy from the
University of Cambridge4, (48) .
(49) He explains that sulphur, for example, shows up in three
different spots -- one for sulphide, which is found in minerals, one for
sulphite, and one for sulphate, which is found in sea salt, for
instance. He has also included symbols to show which ions are
nutrients, and which are common in soil or water. (50)
. A. There have been many attempts to redesign the periodic table
since Dmitri Mendeleev2 drew it up in 1871. B. Railsback has still ordered
the elements according to the number of protons they have. C. "I imagine this
would be good for undergraduates." D. Railsback has listed some elements more
than once. E And the size of element’s symbol reflects how much of it
is found in the Earth’s crust. F The traditional periodic table was
well drawn.