The size of an atom is only a few angstroms at most - there are 10 billion angstroms in 1 metre. This video also looks at the basic parts of an atom (protons, neutrons and electrons) and why the ...

J.J. Thomson — a professor of experimental physics at the University of Cambridge, who in 1897 discovered the electron and in 1904 proposed a model of the atom — was the first person to be ...