Question

Define the atomic mass unit.

Answer 1

Atomic mass unit is defined as a mass exactly equal to one twelfth the mass of one carbon - 12 atom

Answer 2

The dalton or unified atomic mass unit is a unit of mass widely used in physics and chemistry. It is defined as 1⁄12 of the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state and at rest. The atomic mass constant, denoted mᵤ is defined identically, giving mᵤ = m/12 = 1 Da.

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