Question

1/12th the mass of a carbon (C-12) atom is called​

Answer 1

relative atomic mass is defined as the 1/12 the mass of the carbon -12 atom

Answer 2

Answer:

Atomic weight, also called relative atomic mass, ratio of the average mass of a chemical element's atoms to some standard. Since 1961 the standard unit of atomic mass has been one-twelfth the mass of an atom of the isotope carbon-12. ... Atomic weight is measured in atomic mass units (amu), also called daltons.