about modern periodic table
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The periodic table, also known as the periodic table of elements, is a tabular ... The modern periodic table now provides a useful framework for analyzing chemical reactions.The long form of the periodic table is based upon the electronic configuration of the elements. It is the present form or the modern periodic table of elements. The modern periodic table of elements consists of 18 vertical columns and 7 horizontal rows. ... On the other hand, periods are the horizontal rows.
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