Please look at my question!!! valency of nitrate(no3)so nitrogen comes

1.	Please look at my question!!! valency of nitrate(no3)so nitrogen comes in number 7 in periodic table so in case of nitrogen:-in k shell -- 2 atomsin l shell -- 5 atomsso it will take 3 atoms to have 8 atoms in it's valence shell.So it's valency should be -3and oxygen's valency is -2 everyone knows so here is 3 atoms of oxygenso total valency of No3 is -- (-3)+3*(-2)= -3+-6 =-9according to the calculation valency should be -9 but why it's -1????please help meee
Answer» ANSWER: you have to SUBTRACT both VALENCY 2-3

Please look at my question!!! valency of nitrate(no3)so nitrogen comes in number 7 in periodic table so in case of nitrogen:-in k shell -- 2 atomsin l shell -- 5 atomsso it will take 3 atoms to have 8 atoms in it's valence shell.So it's valency should be -3and oxygen's valency is -2 everyone knows so here is 3 atoms of oxygenso total valency of No3 is -- (-3)+3*(-2)= -3+-6 =-9according to the calculation valency should be -9 but why it's -1????please help meee

Answer»

you have to SUBTRACT both VALENCY 2-3