Question

what do you understand by 1 amu or 1u ? (b) how is it linked with relative atomic mass (c)how do we know the presence of atoms if they do not exist independently forost of the element

Answer 1

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

Answer 2

1 amu means one atomic no.

1 u means one atomic no