Carbon-12 Isotope Symbol - Atomic Structure Explained #2050243 (License: Personal Use)

This image displays the standard nuclear notation for carbon-12: the mass number “12” as a superscript left of the element symbol C, and the atomic number “6” as a subscript. Carbon-12 is the most abundant stable isotope of carbon and serves as the reference for the unified atomic mass unit (u), where exactly 1 u equals 1/12 the mass of a carbon-12 atom. Its nucleus contains 6 protons and 6 neutrons, making it essential in chemistry, physics, and radiometric dating calibration.

Used in educational materials, chemistry textbooks, and science websites to illustrate isotope notation and atomic structure; targets students, educators, and professionals seeking foundational nuclear science concepts.