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Question

Selecisoelectroniset:
a) Na+, H3O+,NH4+
b)CO-23 ,NO3,HCO3
c)P-3 ,HCl,C2H6,PH3
d)N-3 ,O ,F

  1. a,b,d    
  2. b,c,d    
  3. a,b,c,d    
  4. a,b,c    

The correct answer is: a,b,c

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