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NCERT CLASS IX - Science Textbook

Chapter 4 - Structure of the Atom

How will you find the valency of chlorine, sulphur and magnesium?


Valency of chlorine = -1
Valency of sulphur = -2
Valency of magnesium = +2

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Chlorine ka electronic configuration  2,8,7 hota h u know 
so  isko ek electrone chahiye octate pura kr ne k liye so 
  agr ham ise ek electron de denge to is ka octate pura ho jye ga 
so valencey bhi iski - 1 hi ho gi 
again sulphur  ka electronic configuration  2,8,6 so  agr ham ise 2 electron de den ge to is ka electoron pura ho jye ga to valency is ki ho gi -2   
for magnesium ka electronic configuration  2,8,2 hota h so agr ham isse 2 ilectrons nikal le to iska octate pura ho jye ga to iski valacy bhi + 2 ho jye gi   kyon ki ham isse electrons nikal rhe h na ki de de rhe h iss liye +2 ho gi 

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