# How do you draw the Lewis Structure for HNO_3?

$O = {N}^{+} \left(- {O}^{-}\right) \left(O - H\right)$
There are $5 + 3 \times 6 + 1 = 18 \text{ electrons}$ to distribute over 4 centres. There are 2 formal charges in the Lewis structure, i.e. on one of the oxygens and on the quaternized nitrogen.