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Democritus
Democritus was one of the two founders of ancient atomist theory. He developed a system that originated from his teacher Leucippus into a materialist account of the natural world. -
John Dalton
Democritus first suggested the existence of the atom but it took almost two millennia before the atom was placed on a solid foothold as a fundamental chemical object by John Dalton (1766-1844). Although two centuries old, Dalton's atomic theory remains valid in modern chemical thought. -
Michael Faraday
Michael Faraday was the discoverer of the relationship between electricity and magnetism, and that one could not exist without the other. Through out his studies he started to believe that there was no such thing as the ether, and he did not believe that matter was a physical substance. Instead, he felt that an infinite amount of invisible lines of force pass through all of space. When these lines intersected they would create matter. From this theory, Faraday felt that light was the motion or v -
JJ Thomson
Thomson discovered the electron in the year 1897. His work put forward a new theory, that atom was made up of small particles. He proved his theory using the cathode ray tube. Scientists had already done many experiments to find the structure of the atom. They passed an electric current through a vacuum tube. They saw a light glowing inside the tube. It travelled in a straight line. They could not explain the phenomenon. Thomson did more experiments on the cathode tube. He placed two electric pl -
Albert Einstien
Albert Einstein became famous for the theory of relativity, which laid the basis for the release of atomic energy. The modern atomic theory is also known as the quantum theory, he contributed to the quantum theory the most by being against it, which caused Neil Bohr to create more models and explanations for it. Therefore, Albert the "Einstein" contributed by criticism.He was one of the greatest scientists of all time. In 1905 Albert contributed three papers to Annals of Physics, a German scien -
Robert Millikan
Robert Millikan done the oil drop experiment, in which he sprayed tiny oil droplets and made them fall through a small electrical charged hole into a closed area. By recording the speed of the particles he was able to find out the charge on a single electron. -
Ernest Rutherford
Ernest Rutherford published his atomic theory describing the atom as having a central positive nucleus surrounded by negative orbiting electrons. This model told us that most of the mass of the atom was contained in the small nucleus, and that the rest of the atom was mostly empty space. Ernest came to this conclusion following the results of his famous gold foil experiment. This experiment involved the firing of radioactive particles through very thin metal foils and detecting them using screen -
Max Planck
German physicist Max Planck proposed the quantum of action, now known as Planck's constant h, explaining the pattern of light intensity emitted from a black body at any given frequency. His work appeared in its earliest form in a 1900 paper titled On The Theory of the Law of Energy Distribution in the Continuous Spectrum, which formed the baseline for a new field of physics, quantum mechanics. In oversimplified terms, Planck explained that energy is not a continuous, flowing entity, but is carri -
Neils Bohr
Neils Bohr’s atomic model was planetary model and has an atom consisting of a small nucleus which is positively charged. Neils’ atomic model is like the solar system, planets orbiting the sun.The way atoms work and revolve around the nucleus are very similar to the way planets revolve around the sun. -
Erwin Shroedinger
Thomson discovered the electron in the year 1897. His work put forward a new theory, that atom was made up of small particles Therefore he discovered the electrons. He proved his theory using the cathode ray tube. Scientists had already done many experiments to find the structure of the atom. They passed an electric current through a vacuum tube. They saw a light glowing inside the tube. It travelled in a straight line. They could not explain the phenomenon. Thomson did more experiments on the -
James Chadwick
James predicted the atom would have a neutron.He established that the numbers of protons in an atom determines an atomic number.He also discovered the fourth subatomic particle, in the neutron.James was most famous for his discovery of the neutron in an atom.Which took place in 1932.During the time period he was alive world war two was taking place during 1939 through 1945. -
Werner Heisenberg
He attended the University of Munich, in Germany, to study physics. Using his knowledge, he created matrix mechanics, the first version of quantum mechanics in 1925. After leaving the University of Munich in 1923, he went to Gottingen with Max Born to study, then to the Institute of Theoretical Physics in Copenhagen with Niels Bohr. He mainly studied physics, and was actually appointed the Professor of Physics at the University of Munich in 1958. Werner soon became interested in plasma physics,
