The Lewis dot structure for nitrogen dioxide, written with the chemical formula NO2, has an "N" with a single dot at the center and two "Os" with four dots. One "O" is connected to the "N" with two lines, and the other "O" is connected with one line.
The "N" represents the nitrogen atom and the two "Os" represent the two oxygen atoms. The dots represent the valence electrons for each atom. Each line represents two electrons bonding together the atoms. The double line represents two pairs of electrons forming a double bond, while the single line represents one pair of electrons forming a single bond.