how do the following traits change in a peeiod from lift to right in the period from left to right in the periodic table ?
a. atomic size
b .valency
c .metallic character
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valency is the right answer
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. Atomic size - On moving from left to right in a period the atomic radius decreases.As we move from left to right the atomic number of each succeeding element increases by 1. ... Therefore the valency of elements first increases from 1 to 4 and then decreases to 0
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