What is periodicity ... Does the periodicity in properties is a function of valence electron?
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Periodicity is one of the most fundamental aspects of the periodic table of the elements. Periodicity refers to the recurring trends that are seen in the element properties. The modern periodic table is very similar to Mendeleev's table, but today elements are ordered by increasing order of their atomic number.
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Answer: reparations of elements with similar property after regular interval is periodicity.
Explanation: the periodicity in the number of electron in outermost shell of the atoms of elements if element 7th sem number of valence electron a group together the elements fall within each group are similar in chemical property
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