1 mole = 6.02 x 1023 units, particles, things, etc. 1 mole of something is 6.02 x 1023 of ANYTHING (birds, coins, lamps, stars, etc.). How did chemists choose THIS number? It is the number of atoms in a 12 gram sample of Carbon-12. We use this number in chemistry because atoms are SO small and their number is so HUGE that using the mole makes things much easier to work with and understand. So, 3 moles of Na atoms is the same as saying 1.806 x 1024 atoms of Na (3 x (6.02 x 1023)= 1.806 x 1024). Watch the video below to learn how to convert between moles, atoms and molecules.