How does number of (i) valence electrons (ii) valency ;vary on the mov – InterviewSolution

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How does number of (i) valence electrons (ii) valency ;vary on the moving from left to right : (a) in the second period of a periodic table ? (b) in the third period of a periodic table ?

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How does number of (i) valence electrons (ii) valency ;vary on the moving from left to right :

(a) in the second period of a periodic table ?

(b) in the third period of a periodic table ?

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