阅读下面的短文，文章中有5处空白，文章后面有6组文字，请根据文章的内容选择5组文字，将其分别放回文章原有位置，以恢复文章原貌。 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 Georgia 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 Cambridge. (48)
. (49) He explains that sulphur,
for example, shows up in three different spots -- one for sulphide, which is
found in minerals, one for sulphitr, 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 Mendeleev drew it up in 1871. B Railsback has still
ordered the elements according lo 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.