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how do the valency and the atomic size of elements vary while going from left to right along the period of modern periodic table |
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Answer» SizeAtomic size decreases on GOING ALONG a period from LEFT to right because the electron ENTERS into the same shell, therefore, ATTRACTION between nucleus and outermost electron increases and thus atomic size decreases.ValencyValency first increases from 1 to 4 and then decreases from 4 to 0 along a period from left to right. This happens because electron donating power increases and metallic character increases and then electron attracting power increases and non-metallic character increases. |
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