What is the Relative Atomic Mass and Relative Molecular Mass of an Element? Relative Atomic Mass Formula The earlier development of relative atomic massAn atom is very tiny. Therefore, it is impossible to determine its mass by weighing. So, chemists compare the mass of an atom with a standard atom. The mass of an atom when compared to a standard atom is known as its … [Read more...] about What is the Relative Atomic Mass and Relative Molecular Mass of an Element?