Question

what is unfilled atomic mass​

Answer 1

The Unified Atomic Mass Unit or Dalton is a standard unit of mass that quantities mass on an atomic or molecular scale. One unified atomic mass unit is approximately equivalent to 1g/mol.

Answer 2

Answer:

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.