Z the position number of NO_(2) Group X,Y,Z aer P,Q,R respectively. The value of P+Q+R is

Z the position number of NO_(2) Group X,Y,Z aer P,Q,R respectively.

1.	Z the position number of NO_(2) Group X,Y,Z aer P,Q,R respectively. The value of P+Q+R is
Answer» SOLUTION :