explain modern periodic tables property-valency.
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The modern periodic table is fully based on electronic configuration,because it is classify according to the atomic number.
1) in the same group have same valency.
1) in the same group have same valency.
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The periodic table, also known as the periodic table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties. The structure of the table shows periodic trends
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