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400
Democritus
Found the atom and said that all atoms are invisable -
John Dalton
Proposed the Atomic theory and said that atoms can't be made or destroyed -
JJ Thomson
Atoms are balls of positive charge that contains a number of electrons, and discovered electrons -
Aston
Discovered isotopes through a mass spectograph -
Nelis Bohr
Father of Quantam theory, he said that "a atom is a succesive or bital shells of electrons" he came up with the "Bohr Planetary Model" -
Ernest Rutherford
Father of Nucleus Physics,developed the "Gold Foil Experiment", also determined that a atoms nucleus is very dense and that it has a positive charge. -
Erwin Schrodinger
Developed the "Electron Cloud Theory", and that it's probable location of moving particles. -
John Cockroft and Ernest Walton
Built the early linear accelerrator, bombarded the element lithium with protons to create alpha particles, split an atom for the first time that later led to the atomic bomb -
James Chadwick
Discovered the neutron and that a neutron weighed the same as a proton -
Enrico Fermi
Conducted the first chain reaction of releasing energy from the atoms nucleus
