Most of the elements exist in diferent isotopes i.e. atoms with different masses e.g. Cl has two isotopes with mass numbers 35 and 37 existing in the ratio 3:1. Hence average value is taken.
759 Views
Advertisement
What is Avogadro's number?
What is the relation between gram molecular weight and volume of a gas?
What is atomicity of an element?
What is the relation between molecular weight and vapour density?
