Chemistry-
General
Easy

Question

The maximum valency of an element with atomic number 7 is

  1. 2  
  2. 5  
  3. 4  
  4. 3  

The correct answer is: 5


    Valency is according to valence shall configuration which here is 1 s to the power of 2 end exponent comma 2 s to the power of 2 end exponent comma 2 p to the power of 3 end exponent comma i e.5

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