Question

Valency of nitrogen in n2o4

Answer 1

electrons for stability. so they share 3 nitrogen electrons and one among themselves. but in case of nitrogenin NO2 its valency is not satisfied. hence it exists as dimer N2O4

Answer 2

Heya....!!!

  _____________________

  Actually The Formula is N2O4

  As, We Know That,

 The Final Formula is after the criss-cross method

 Hence, 

 Here, Valency Of N is 4

 & Valency of O is 2

 Hence,

 The final formula becomes, N2O4

 ___________________________

 Thanks....

 Hope This Helps...

 ^_^