Sulfur oxides combine with water in the atmosphere to produce acid rain. what is the empirical formula of a sulfur compound that is 40% sulfur and 60% oxygen?

In chemistry, the type of an atom (what element it is) is determined by: a) the number of protons it contains in its nucleus. b) the number of neutrons it contains in its nucleus. c) the number of protons it has in a cloud around the nucleus. d) the number of neutrons it has in a cloud around the nucleus. e) the number of electrons it exchanges with its neighbors.