Question

Define one atomic mass unit (a.m.u.).

Answer 1

Atomic mass unit:

• An atomic mass unit 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.
• It is represented as a.m.u or u (unified).
• It is a unit of mass used to express atomic masses.
• 1 a.m.u is the average of the proton rest mass and the neutron rest mass.
• 1 a.m.u. = 1.67377 x 10^-27 kilogram or 1.67377 x 10^-24 gram.