The Lewis structure for xenon trioxide, which is written with the chemical formula XeO3, has an Xe in the center with three sets of radiating double lines leading to three Os. The Xe is bordered by a pair of dots, and each O is bordered by two pairs of dots.
The Xe represents the xenon atom, and the three Os represent the oxygen atoms. Each line represents a pair of bonded electrons, and each dot represents a valence electron, which is an electron in the outer shell of the atom. Counting each dot as one electron and each line as two electrons, the total number of electrons represented in the Lewis structure should equal the total amount of valence electrons in the molecule.