Carbon is the chemical element with the atomic number 6. This nonmetal is fundamental to life as it is a key component of all known organic compounds. Carbon atoms can form stable bonds with many elements, particularly with itself, creating a vast array of structures including chains and rings. This versatility allows for the formation of complex biological molecules, like carbohydrates, proteins, lipids, and nucleic acids. Also, carbon is present in different forms, such as graphite and diamond, and plays a crucial role in important processes like photosynthesis and respiration.