CBSE Class 11-science Answered
About trends in the classification
Asked by era.singh | 18 Oct, 2009, 12:02: AM
Expert Answer
This is because as we move along a period, the number of valence electrons increases from 1 to 8. SInce valency is equal to 1,2,3,4 if the number of valence electrons are 1,2,3,4. Then after that since the number of valence electrons increase from 5 to 8, the valency = 8 - number of valence electrons. SO the valency will decrease from 3,2,1, and then become 0.
Answered by | 20 Oct, 2009, 10:05: AM
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