Atomic Theories and Models

J. J. Thomson and the discovery of the electron:
http://www.youtube.com/watch?v=IdTxGJjA4Jw

Ernest Rutherford and the discovery of the atomic nucleus:
http://www.youtube.com/watch?v=wzALbzTdnc8&feature=related
and (more detailed)
http://www.youtube.com/watch?v=FfY4R5mkMY8&feature=related