Formulae on Some Basic Concepts Of Chemistry


 


1
Atomicity is the number of atoms of an element present in one molecule of that element. They can be monatomic (He),diatomic (H2),triatomic (O3) and polyatomic (S8).



2
Relative molecular mass shows the number of times a molecule is denser than a hydrogen atom or one amu. It is expressed as the ratio of the mass of a molecule of a substance to the mass of one amu (or to one atom of hydrogen).



   3
Relative molecular mass= Mass of one molecule of a substance/one amu.



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