Avagadro's number

AVAGADRO'S NUMBER

A mole is defined as the amount of substance that contains 6.023 x 10²³ particles of that substance this experimentally determined number is known as Avagadro's Number.

• The particle may be electrons, atoms, molecules, ions, or formula units.
• This number creates a link between the macroscopic and microscopic world and relates the number of particles with the amount of substance.
• This number is represented by NA.
• 1mole of substance = 6.023 x 10²³  particles

Examples:

• 1 mole of carbon contains 6.023 x 10²³ atoms of carbon.
• 1 mole of water 6.023 x 10²³ contains molecules of water.
• 1 mole of sodium chloride 6.023 x 10²³ contains formula units.
  
•  1 mole of sodium ions contains 6.023 x 10²³ ions of sodium.