Definition: Carbon is a chemical element with the symbol "C" and atomic number 6. It is a non-metal and an essential building block of life as it plays a fundamental role in the structure of organic compounds. Carbon is unique among the elements in its ability to form long chains and complex structures, primarily due to its tetravalent nature, meaning it can form four covalent bonds with other atoms. Key characteristics of carbon include: 1. Versatility: Carbon can form a variety of compounds with other elements, and its ability to bond with itself and other elements is the basis for the vast diversity of organic compounds. 2. Allotropes: Carbon exists in several allotropes, including diamond, graphite, graphene, and carbon nanotubes. Each allotrope has distinct properties and structures. 3. Biological Importance: Carbon is a crucial element in the molecules of life. It forms the backbone of organic molecules such as proteins, nucleic acids (DNA and RNA), carbohydrates, an