How does the valency of elements vary across a period ??????
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The valency of an element depends the availability of an electrons (or electrons) in its valence shell i.e on its valence electrons. Across the period, first it increases from 0 to 4 and then starts decreasing from 4 to 1.!!
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Answer : The valency of an element depends the availability of an electrons (or electrons) in its valence shell i.e on its valence electrons. Across the period, first it increases from 0 to 4 and then starts decreasing from 4 to 1.
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