Tag: Atom

One gram of copper has 95 trillion copper atoms. How can such small particles be observed?

As we all know, an atom is a very small particle. How small is an atom? It can be seen from the periodic table that the relative atomic mass of copper is 63.55, that is, the mass of one mole of copper is 63.55 g. according to the definition, one mole of copper contains about 6.02 x 10 ^ 23 copper atoms. Based on this, we can calculate that there are about 9.5 trillion copper atoms per gram of copper.