mass of neutrons + mass of protons
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atomic mass unit is equal to one-twelfth of the mass of a carbon-12 atomic mass is equal to one-twelfth of the mass of a carbon-12Atomic Mass is equal to the number of protons and neutrons.
The atomic mass unit is not a SI unit. An atomic mass unit is equal to 1/12 from the atomic mass of the isotope 12C.
The atomic mass is the mass of a molecule, atomic particle or sub-atomic particle.
One-twelfth the mass of a carbon-12 atom or 1,660538921(73)×10−27 kg.
== The equation of atomic mass is protons+nuetrons== atomic mass. ===