# Using the Lewis electron dot structure for #NO_3^-#, what is the total number of non-shared electrons?

##### 1 Answer

May 7, 2016

#### Answer:

Given the ONE resonance isomer, there are 8 (unshared) lone pairs on the oxygen atoms.

#### Explanation:

Because there are 7 valence electrons around each singly bound oxygen atom, these atoms have a formal negative charge. To balance this