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Cathode Ray Tube Expirement
One of JJ Thompson's idea -
Ernest Rutherford
1871-1937 Nuclues theory of 1910, alpha particle gold foil expirement. An atom's mass is mostly in the nucleus. Nucleus has a positive charge. -
Rutherford Model
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Niels Bohr
1885-1962 Planetary model 1913. Nucleus is surronded by electrons at different energy levels. Utilized Plack's Quantum Energy theory. Worked on the Manhattan Project(US atomic bomb) -
Ernst Schodinger 1887-1961 Werner Heisenberg 1901-1976
Quantum Mechanical Model 1962
Electrons are in probability zones called orbitals, not orbits, they can't be pinpointed in location. Electrons are particles and waves at the exact same time. Developed quantum number bassed on theories of Einstein and Planck -
Democritus
First concept of an Atom was invented in 460 - 370 B.C -
John Dalton
1766-1844 Dalton's model. Each one of the element is composed of extremlly small particles called atoms. All the atoms of a given element are identicial but they are different from those of any other element. Atoms are neither created or destroyed in any chemical reaction. -
J.J Thompson
He discovered electrons 1897 – Cathode Ray Experiment
Plum Pudding Model 1904
Electrons in a soup of positive charges
Discovered Isotopes 1913 -
Plum Pudding model
Another one of JJ Thompson's idea
