Question: how many atoms are there in one mole of an element?
Answer: One mole of atoms contains 6 x 10 23 atoms, no matter what element it is. This is a very large number: it is 6 with 23 zeros after it. It is known as the Avogadro number. This number is used in chemistry because if you could count out this many carbon atoms, the total mass of carbon you would have is 12 g.