hw does valency changes in a periodic table from left to right?
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From left to right in a periodic table,valency decreases....
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The arrow describes the non-metallic character of elements from left to right in a period.
On moving from left to right in a period,
The number of valence electrons in elements increases from 1 to 8.
The valency of elements increases from 1 to 4 and then decreases to 0.
The size of the atoms decreases
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