welove07
welove07
17-03-2017
Chemistry
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Why they call it "Periodic Table"?
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julams01
julams01
17-03-2017
scientists finally found the reason for the periodicity of the elements: Valence electrons. And so the table became known as the Periodic Table
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annadance12355
annadance12355
17-03-2017
the periodic table has rows running left to right and colums running up and down.
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