sulfur
Sulfur is a chemical element whose chemical symbol is S in the periodic table and the atomic number is 16. Sulfur is a very common tasteless and non-metallic, pure sulfur is a yellow crystal, also known as sulfur. Sulfur has many different valence, common have -2, 0, +4, +6 and so on. In nature it often appears in the form of sulfide or sulphate, especially in volcanic areas where pure sulfur is also present in nature. For all organisms, sulfur is an important essential element, it is a variety of amino acid components, especially the majority of protein components. It is mainly used in fertilizers and is also widely used in gunpowder, lubricants, insecticides and antifungal agents. ...