Question

what is realtive atomic mass. Give Example? ​

Answer 1

Answer:

Relative atomic mass

A relative atomic mass (also called atomic weight; symbol: Ar) is a measure of how heavy atoms are. It is the ratio of the average mass per atom of an element from a given sample to 1/12 the mass of a carbon-12 atom.

For example, the element thallium has two common isotopes: thallium-203 and thallium-205.