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Democritus
He was a greek philosopher who first suggested the existence of atoms. His atomic theory stated that the universe is composed of two elements: the elements and the void that which they exist to move. According to Democritus, Atoms were miniscule quantities of matter and he hypothesized that they could not be destroyed. -
Antonie Lavoisier
A french nobleman who is claimed to be the father of chemistry. He discovered the Law of Conservation of Mass. He invented the naming of compounds and named the element Hydrogen. And also discovered that water is a compound made of hydrogen and oxygen. -
John Dalton
John Dalton was a school teacher, meteorologist, and an expert in color blindness. But he is best known for pioneering the theory of atomism. John Dalton helped change Democritus's ideas on atoms into scientific theory. -
Dmitri Mendeleev
Founder of the original Periodic Table. -
Eugen Goldstein
Found protrons with his experiments with cathode rays. -
Ernest Rutherford
Rutherford overturned Thomson's model of the atom with his gold foil experiment where he shows that the atom has a tiny heavy nucleus. He designed a new experiment to use alpha particles that are emitted by a radioactive element, to the unseen world of atomic structure. -
Henry Moseley
Developed the application of the X-ray spectra to study atomic structure, his discoveries resulted in a more accurate placing of elements in the Periodic Table by having a closer determination of atomic numbers. -
Niels Bohr
Niels Bohr was born October 7th, 1885, in Copenhagen Denmark. Niels Bohr made the discovery of electron and radioactivity at the end of the 19th century which led to the way of how we see the structure of atoms. He also proposed the theory for hydrogen atom on quantum theory that energy is transferred in only in well defined quantities. -
Max Planck
Came up with the Quantum Theory. -
Robert Millikan
An American physicist who won a nobel prize measuring the charge on a electron. -
Werner Heisenberg
Published the theory of Quantum Mechanics, for this it resulted in the discovery of allotropic forms of hydrogen. -
J.J. Thomson
J.J. Thomson managed to estimate the magnitude of electricity transmitted by a tiny particle related to the atom and was first forwarded in the 1930's. Also in 1897, he showed that cathode rays consists of particles like electrons that conduct electricity. -
James Chadwick
In 1930, a strong penetrating radiation was emitted when Herbert Becker and Walter Bothe directed alpha particles which was a helium nuclei at beryllium. In 1932, James Chadwick proved that the particle had the same mass as a proton. This particle was actually a neutron. -
Erwin Schrodinger
Came up with a wave equation for electron movements
