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USBmonkey
May 6, 2009, 12:55 PM
Why does no3 have a valency of -1
Perito
May 6, 2009, 01:17 PM
In nitrate, nitrogen is in the +5 oxidation state. The oxygens are each in -2 oxidation states. The nitrogen has been oxidized a lot!

5 + 3 (-2) = -1