The modern periodic table, arranged in rows and columns, was first introduced by Dmitri Mendeleev in 1869. At the time, it included the known elements and their properties, but Mendeleev predicted ...
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Why are rubies red and emeralds green? Their colors come from the same metal in their atomic structureResearchers in my field work to understand the chemistry of all the elements that make up the periodic table. Many inorganic chemists focus ... which is composed of the elements aluminum and oxygen in ...
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