•---1915-1950

__Neils Bohr 1922 __ Neils Bohr was born October 7, 1885 in Copenhagen Denmark and he died in 1962. He went to the Copenhagen University where he was guided by Professor C.Christiansen. He received his masters degrees in Physics in 1909, and his doctors degree in 1911. While still a student he found a solution of a scientific problem which involved experiments and investigation of the surface tensions of oscillating fluid jets. In 1943, Bohr's mother who was Jewish fled German occupied Denmark in a fishing boat to Sweden. He also helped to create the atomic bomb. Bohrs son received the Nobel peace prize in 1975.  This photo from [] //In the Rutherford-Bohr model it is desighned so that the nucleus is the core of the atom and the electrons move around outside of the core. The core or the nucleus is made up of protons and neutrions.// Bohr discovered that neutrons and protons occupy a dense central region called a nucleus, and electrons orbit the nucleus. Bohr created a model of atomic structure that showed that electrons traveling around the nucleus of an atom. Bohr improved on Rutherford's idea of an atom and he said that electrons move around the nucleus in restricted orbits and explained how they function. Bohr was a leading scientist in quantum physics and from is theory he received a Nobel peace prize in 1922 in physics.

__James Chadwick 1932__  This picture from [] James Chadwick was born October 20, 1891 in Cheshire England and he died on July 24, 1974. He attended Manchester High School and later attended Manchester University in 1908. During World War I he was a prisoner of war in Germany. After the war he returned to England and rejoined with his mentor Ernest Rutherford. Chadwick graduated from Manchester University in 1911. He was awarded the Hughess Medal of the Royal society in 1932. From 1943-1946 he worked in the United States as head of the British Mission collaborating with the Manhattan project. He was also knighted by King George VI in 1945. He discovered that there were particles in the nucleus which were neutrally charged called neutrons. He did this by using a method to defect particles emitted by radioactive elements. The impact this was that the neutrons were able to lead to the discovery of nuclear fission and the development of the atomic bomb, and nuclear power.

__Werner Heisenberg 1932__ Werner Heisenberg was born on December 5, 1901 in Wuzburg and he passed away in 1976. His father was a professor at the University of Munich he taught Greek languages. Heisenberg went to the Maximilian school at Munich until 1920. He studied physics under Somerfield, Wean, Pringsheim, and Rosenthal. In 1923 he took his Ph.D. at the University of Munich. He became an assistant to Max Born at the University of Gottingen. At the end of World War II he and other German scientists were taken prisoner by American troops and sent to England. In 1946, he returned to Germany and the institute for physics at Gottingen. Also, he worked on developing an atomic bomb for Germany. He created the uncertainty principle which restricts accurate with which some properties of an atom and particles such as position and linear momentum can be determined simultaneously. As a result, the values that he gained helped calculate mathematical formulas and the probabilities of particular energy states. His findings lead to the development of nuclear and atomic bombs.  This picture from [] <span style="font-family: 'Arial','sans-serif';">//The electron cloud model is a visual on the most accurate accurate electron position in the atom. In this model when the nucleus is staying in the smane area but the electrons are contstantly moving around.// <span style="font-family: 'Arial','sans-serif';">__Erwin Schrodinger 1933__ <span style="font-family: 'Arial','sans-serif';">Erwin Schrodinger was born August 12, 1887 in Vienna and he died January 4,1961. From 1906 to 1910 he was a student at Vienna University. He was strongly influenced by Fritz Hasenchrl. Schrodinger was taught at home by a private tutor until he went to Akademisches Gymnasium in 1898. After receiving a Ph.D. he took voluntary military service. He was sent to the Italian border. After his military service he took a job as an assistant in experimental physics at the University of Vienna. The result of World War I collapsed Austria's economy and ruined his family. <span style="font-family: 'Arial','sans-serif';"> This picture from [] <span style="font-family: 'Arial','sans-serif';">He suggested that electrons behave in a wave like manner rather than just particles and that their exact location within an orbit couldn't be accurately determined. His view of the atoms is defined as layer upon layer in terms of the electron shell. Each electron shell is made up of a number of sub shells