Sulfur is an element. Its atomic number is 16, which means one neutral atom of sulfur has 16 protons and 16 electrons.
Sulfur is one of the most abundant elements on earth. It has an atomic mass of approximately 32.1 amu, a boiling point of 444.6 C and a melting point of 112.8 C. No one knows who discovered sulfur, but the element has been around for centuries.
Sulfur is used to produce several different compounds. One of the most well-known of these compounds is hydrogen sulfide, which is made up of two atoms of hydrogen for every one atom of sulfur. Sulfur dioxide has two atoms of oxygen for every one atom of sulfur. This compound is used as a refrigerant and disinfectant. When sulfur dioxide combines with water, it forms an acid called sulfurous acid. Sulfurous acid is one of the compounds found in acid rain.