In nature, carbon exists as two stable, nonradioactive isotopes: carbon-12 (12 C), and carbon-13 (13 C), and a radioactive isotope, carbon-14 (14 C), also known as "radiocarbon".
Di alam, karbon hadir sebagai dua isotop stabil, nonradioaktif: karbon-12 (12C), dan karbon-13 (13C), serta sebuah isotop radioaktif, karbon-14 (14C), yang dikenal pula sebagai "radiokarbon".