Question

define atomic mass unit ​

Answer 1

Answer:

A unit of mass used to express atomic and molecular weights , equal to one twelfth of the mass of an atom.

Please mark me as brain liest..

Answer 2

Answer:

Explanation:Atomic mass unit is a unit which is used to measure the atomic mass and molecular mass of elements and compounds.

1 amu = 1/12 the mass of C12 atom.