Now, a mole which is represented by lowercase N is a group that consists of an avogadro's number of anything. Now, in the same way that a dozen represents a group of twelve, a mole represents a group of this many things. Now, we could have a dozen roses, a dozen eggs, a dozen chickens, a dozen chairs, cars, books, people. In the same way we can have a mole of anything. Now, the only thing is a mole is usually used for very small things. For example, we can talk about a mole of protons, a mole of electrons, a mole of atoms, a mole of molecules.