The element with atomic number 6 is carbon. This nonmetal element plays a crucial role in the chemistry of life, as it is the primary building block of organic molecules. Carbon's ability to form stable bonds with a variety of elements, including itself, allows for the creation of complex structures like proteins, lipids, and nucleic acids. Its allotropes, such as graphite and diamond, demonstrate its versatility. Carbon's significance extends beyond biology; it is also essential in industries like steel production and in the creation of carbon-based materials. Thus, carbon is fundamental to both life and various technological applications.