An isolated H atom<span> has </span>one<span> electron. So the H </span>atom in sulfuric acid<span> has a </span>formal charge<span> of zero. The O</span>atom<span> next to H "owns" the four lone pair electrons, plus </span>one<span> electron from the O-H bond, plus </span>one atom<span>from the O-S bond. This makes a total of six electrons</span>
