Aarti Gupta
Last Activity: 10 Years ago
An atomic mass unit or amu is defined as one twelfth of the mass of an unbound atom of carbon -12. It is a unit of mass, used to express atomic masses and molecular masses.By definition, 12 amu equals the atomic mass of carbon-12.Although carbon exist in different isotopic forms ,but in this reference scale of a.m.u ,C-12 refers to carbon which has atomic number 6 in the periodic table having 6 protons and 6 neutrons respectively.