-
370
Democritus
Democritus is the father of modern science and created the first atomic theory. -
John Dalton
John Dalton created the second atomic theory which states: atoms are invisible and indestructable, atoms can neither be created or destroyed, and that all atoms of a given element are identical -
J.J. Thomson
created third atomic theory which says that the charges in both posistive and negative are equal in magnetude -
Ernest Rutherford
Ernest Rutherford created the fourth atomic theory and the first acurate one. He discovered that the atom must have almost all of its mass in the center. -
Neils Bohr
discovered that electrons orbit the nucleus without losing energy -
James Chadwick
James Chadwick worked with Ernest Rutherford in his laboratory and he discovered the neutron.
