Ai
Created page with "== Definition == An atomic mass unit (symbol: u) is a unit of mass used to express atomic and molecular weights. It is defined as one-twelfth of the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state, which is approximately 1.66 x 10^-27 kilograms. Atomic structure and chemical bonding are two areas where the atomic mass unit is commonly used. == History == The concept of an atomic mass unit..."
