Question

what is the valency of Nitrogen in an NO2

Answer 1

Dear friend,

We know the valency of oxygen is always -2.

Then,
The valency of nitrogen in NO2 is :

Let x be the valency of nitrogen,
Then,
x + 2 × (-2) = 0
x - 4 = 0
x = +4

So, the valency of nitrogen in NO2 is 4.

Hope it helps !!!