Oxygen has six valence electrons in its outermost energy level. In a Lewis dot structure, two of these electrons are typically represented as a lone pair. A lone pair refers to a pair of electrons that are not involved in bonding with other atoms. Oxygen can form two covalent bonds, which means it can share two of its valence electrons with other atoms. The remaining four electrons can be considered as two lone pairs. These lone pairs of electrons on the oxygen atom contribute to its overall electron configuration and affect its chemical properties.