-
Period: to
Atomic Theory
-
John Dalton
Name - John Dalton
Year/s he worked - 1803
Nationality - English
His contributions - Introducing the atomic theory to chemistry -
Frederick Soddy
-
Jams Chadwick
-
JJ Thomson
Name - Joseph john Thomson
year/s He worked - 1897
Nationality - Scottish
His contribution - experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons -
ernest Rutherford
Name - Ernest Rutherford
Years he worked - 1907
Nationality - New zealand
Contribution - He found that the atom is mostly empty space, with almost all its mass concentrated at the central nucleas -
Henri Becquerel
-
Leo Cartwright
Leo discovered that the atom is really small
