Question

Definitions of atomic mass nd atomic no.

Answer 1

Answer:-

Atomic mass, which is also known as atomic weight, is the average mass of atoms of an element, calculated using the relative abundance of isotopes in a naturally-occurring element. Atomic mass indicates the size of an atom.

The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of an atom. It is identical to the charge number of the nucleus.