The molecule NO, which represents a nitrogen atom bonded to an oxygen atom, has a total of 11 valence electrons. Nitrogen has 5 valence electrons (it is in Group 15 of the periodic table), and oxygen has 6 valence electrons (it is in Group 16). When they form a bond, nitrogen contributes 3 electrons, and oxygen contributes 2 electrons, resulting in a total of 5 + 6 = 11 valence electrons for the NO molecule.