1915AD-1950AD

=Werner Heisenberg 1925= Werner Heisenberg was born in 1901 in Germany. He was a physicist. He worked with Neils Bohr at the University of Copenhagen. Heisenberg is best known as the father of quantum mechanics. He is also known for his uncertainty theory. Heisenberg multiplies mass times velocity of a subatomic particle to predict the future behavior of the particle. Heisenberg was the leader of Germany's Nuclear Fission research during WWII. =Erwin Shrodinger 1926= Erwin Shrodinger was born in Vienna, Austria in 1887. He invented wave mechanics in 1926. Wave Mechanics describe the behavior of electrons through a mathematical equation. This equation was used in the next year by Max Born to find the exact location of a particle in an atom. Shrodinger came to the conclusion that matter is made up of waves. This made us believe that matter was made up by both particles and waves. This is a contradiction. Davies talks about the duality: =//"The idea that something can be both a wave and a particle defies imagination, but the existence of this wave-particle 'duality' is not in doubt. .. It is impossible to visualize a wave-particle, so don't try. ... The notion of a particle being 'everywhere at once' is impossible to imagine. (**Davies**, 1985)"// Electron Cloud Model   The Electron Cloud model was presented by Erwin Shroedinger. The cloud-like region is an estimate where the electron is likely to be found. It can't pinpoint where an electron is, but can identify where it ought ought to be. The electron leaves a dot where it was. This creates a cloud and forms the electron cloud model. = =James Chadwick 1932= James Chadwick was born in Bollington, England in 1891. Chadwick studied at the University of Manchester and Cambridge. Chadwick is best know for his discovery of the Neutron. He named it the neutron because it lacked a charge. Chadwick was awarded the Nobel Peace Prize for physics in 1935 and was also awarded the Hughes Model of the Royal Society in 1932. His discovery mad it possible to create with a greater mass than uranium in the laboratory. Because of Chadwick's discovery, "nuclear fission" was discovered.