The chemical formula "SO₄" represents the sulfate ion, which consists of one sulfur atom (S) surrounded by four oxygen atoms (O). It carries a negative charge of two, denoted as SO₄²⁻. Sulfate is commonly found in nature and is an important component of various minerals and salts. Sulfate plays a significant role in environmental and biological processes. It is involved in the formation of acid rain and can be found in fertilizers, helping plants grow. Additionally, sulfate is essential for the metabolism of certain organisms, including bacteria and plants.