how does the valency of elements vary in a period on moving from left to right in the periodic table.
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On moving from left to right in the periodic table, valency increases up to 4 and then decreases. ... On moving across a period atomic size decreases because of the electron increases by 1 whereas, the number of valence shell remains the same. Therefore as a result of an increase in nuclear charge, atomic radius decreases.
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Answer:
On moving from left to right in the periodic table, valency increases up to 4 and then decreases.
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