The Lewis structure of the nitronium ion is shown in the image attached.
Two oxygen atoms and a central nitrogen atom form the Lewis structure of the nitronium ion. Each oxygen has a formal charge of zero, but the nitrogen has a formal charge of +1. Single bonds hold the skeleton together, and this configuration guarantees that every atom complies with the octet rule.
The presence of a positive charge in the nitronium ion is indicated by the nitrogen's overall formal charge of +1. Lewis structures, it should be noted, offer a condensed picture of molecular bonding and electron distribution.