Question

Define atomic mass unit ???

Answer 1

a unit of mass used to express atomic and molecular weights, equal to one twelfth of the mass of an atom of carbon-12.

plz mark it as brainlist

Answer 2

An atomic mass unit (symbolized AMU or amu) is defined as precisely 1/12 the mass of an atom of carbon-12. The carbon-12 (C-12) atom has six protons and six neutrons in its nucleus.