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Explain periodicity of valence or oxidation state of s and p block elements. |
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Answer» SOLUTION :a )Vacation of valence across a period: As we more across a period from left to RIGHT , the number of valence electrons increase from1 to 8 The valence with RESPECT to hydrogen or chlorine first increases from 1 to 4 and then decrease from 4 to 0 . However, valence with respect to oxygen increase from 1 to 7Ex:Element , of 2nd and 3rd periods. b) Vacation of valence down a group : on moving down a group , the number valence electronsremain the same , and therefore , the elements in a group showthe same valiancy . Examples : All the elements of group 1 are monovalent ( valiancy = 1 ) andall the elements of group 2 are divalent ( valiancy = 2 ) |
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