The symbol for the element carbon is "C." Carbon is a non-metal and is the fourth most abundant element in the universe by mass. It is essential for life, forming the backbone of organic molecules, including carbohydrates, proteins, lipids, and nucleic acids. Carbon's ability to form stable covalent bonds with various elements, including itself, allows for the vast diversity of organic compounds. Carbon is also a key component in materials such as graphite and diamond, showcasing its versatility in both biological and geological processes.