Atomic mass constant
In physics, the atomic mass constant mu is 1/12 of the mass of the 12C nuclide, in its ground state and at rest.
By definition mu is equal to 1 u, the unified atomic mass unit. The latest value is mu = 1.660 538 921 × 10−27 kg.
- ↑ Retrieved on June 10, 2011 from NIST website