Question

define atomic mass unit​

Answer 1

Explanation:

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.

Answer 2

$\huge {\boxed {\purple {\underline {\overline {\mathcal \fcolorbox{navy}{skyblue}{ANSWER}}}}}}$

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

1 AMU = Average of the proton rest mass and the neutron rest mass.

1 AMU = 1.67377 x 10 -27 kilogram or 1.67377 x 10 -24 gram.