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Democritus
Formulation of an atomic theory of the Universe. Believed everything is formed of atoms and they aren't geometrically divisible. Said there are empty spaces between atoms, atoms also have been and always will be indivisible. Infinite number of atoms that differ in size and shape. -
Antoine Lavoisier
Known as the father of modern chemistry. Discovered the role oxygen plays in combustion. Helped construct the metric system. He also predicted the existence of silicon. He was known to establish sulfur as an element and not a compound. He also stated that all matters mass is always the same. After his first experiment he reported that when phosphorus burned it combined with a large quantity of air to produce acid spirit of phosphorus and increased on weight when burning. -
John Dalton
He was a meteorologist. He is known for his pioneering work in the development of modern atomic theory: atoms are combined,separated, and rearranged. Also known for his research in colour blindness. -
J.J Thompson
British physicist. Discovered the electron. Found first evidence for isotopes. -
Max Planck
German theoretical physicist. Originated the quantum theory and got a Nobel prize in 1918. -
Marie Curie
She conducted pioneer research on radioactivity. She also discovered polonium,and that rays caused air around to product electricity. Marie was the only woman to win two noble prizes for chemistry. -
Robert Milikan
Honored with a noble prize for physics in 1923, for figuring out that the measurement of the elementry charge and for his work in photoelectric effect. He began series of experiments to determine the electric charge carried by a single electron. -
Ernest Rutherford
Nuclear reaction between nitrogen and alpha particles. Discovered authorium gave off the gass that produced emanation, which was itself radioactive and coated other substances. -
Albert Einstein
Theoretical physicist, known for development of radioactivity. His work is also know for its influence on the philosophy of science. -
Niels Bohr
He made foundational contributions to understanding atomic structure and the quantum theory. Got a Nobel prize for physics in 1922. -
Erwin Schrodinger
He developed a number of fundamental results in the field of the quantum theory wave equation, and revealed identity of his development of formalism and matrix mechanics. -
James Chadwick
Calculated the mass of the proton, and discovered the neutron in 1932. He was awarded the nobel prize for physics in 1935. -
Louis de Brogile
Made ground breaking contributions to the quantum theory. Postulated the wave nature of electrons and suggested that all matter has wave properties. -
Werner Heisenberg
One of the key pioneers of quantum mechanics. In 1925 he published his work in a breakthrough paper.
