Question

1 ur or 1 amu means-
@ 1/12th mass of C-12 atom
@ Mass of C-12 atom
① mass of 0-16 atom
@ mass of Hydrogen molecules​

Answer 1

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.