How many atoms are there in a graphite pencil dot?

There are 6.02 x 10^23 molecules per mole of any substance: this is 0.6 trillion trillion molecules.

A mole of water is only 18 grams. A regular wood pencil weighs about half of that. There will be fewer molecules of wood but more atoms per molecule. But you are still talking a range of hundreds of billions of trillions of atoms (10^22) in an item the size of a pencil.