An atom is so small that a single drop of water contains more than a billion atoms. Although tiny, atoms are mostly empty ...

In a recent lecture before the Royal Institution he selected as his subject "The Existence of Bodies Smaller than Atoms ... to determine the size of an atom. One method of doing this was by ...

After tracing many particles and examining the patterns, Rutherford deduced that the atom must have nearly all its mass, and positive charge, in a central nucleus about 10,000 times smaller than ...

as electrons are even smaller, most of an atom is empty space the diameter of a nucleus can be 100,000 times less than the diameter of an atom The mass of electrons is very small compared to ...