Avogadro's number

Avogadro's number

                                Avogadro's number  number of units in one mole of any substance (defined as its molecular weight in grams), equal to 6.022140857 × 10²³. The units may be electrons, atoms or ions, or a molecules, depending on the nature of the substance and the character of the reaction . 

 

Significance 

  Avogadro's number is a proportion that relates molar mass on an atomic scale to physical mass on a human scale. Avogadro's number is defined as the number of elementary particles (molecules, atoms, compounds, etc.) per mole of a substance. It is equal to 6.022×10²³ mol^-1.

Representation 

                         It is expressed as the symbol N_A.