what is atomic mass unit ?
Ans:-
(i) Atomic mass unit is defined as accurately 1/12th part of the mass of a carbon-12 atom.
(ii) The carbon-12 atom has six neutrons and six protons in its nucleus.
(iii) It is represented as a.m.u or u (unified).
(iv) It is a unit of mass used to express atomic masses.
(v) 1 a.m.u is the average mass of the proton and the neutron .
(vi) 1 a.m.u. = 1.67377 x 10-27 kilogram or 1.67377 x 10-24 gram.