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Dalton
John Dalton FRS (6 September 1766 – 27 July 1844) was an English chemist, meteorologist and physicist. He is best known for his pioneering work in the development of modern atomic theory, and his research into colour blindness (sometimes referred to as Daltonism, in his honour). John Dalton FRS (6 September 1766 – 27 July 1844) was an English chemist, meteorologist and physicist. He is best known for his pioneering work in the development of modern atomic theory, and his research into colo -
scientists develop cathode rays
In the early 1870's scientists found that when most of the air inside a glass tube was removed by a vaccuum pump. and a high voltage was applied to two electrodes inside the tube, a small electic current would pass through the remaining gas -
discovery of the X-ray
Wilhilm Rontgen discovered the after covering a cathode ray tube with black paper and allowing cathode rays to strike a metal plate the rays outside the tube cause flouorescent minerals to glow and also exposed photographic film. The rays he discovered had no name so he called them X-rays -
discovery of electrons
discovery of electron
Amid glowing glass tubes and the hum of electricity, JJ Thomson was venturing into the interior of the atom. -
Marie and pierre curie (Noble Prize)
http://youtu.be/ymXDmyC7Nrs
Marie and Pierre shared the prize with Henri Becquerel for their reserch in Radiation. Henri Becquerel began to experiment with flourescent minerals , some containing uranium. The Curies investigated deeper and discovered two entirely new elements radium and polodium. -
Albert Einstein
http://www.nobelprize.org/nobel_prizes/physics/laureates/1921/einstein-bio.htmlhttp://nobelprize.orgAlbert Einstein published his Special Theory of Relativity -
Physisist Ernest Rutherford
He discovered the nucleus of the atom in 1918. He became convinced that the hydrogen nucleus was an elemtary particle he named it the proton. he developed a model of the atom that resembled the solar system -
Types of Radioactivity (Diagram)
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Physisist James Chadwick
discovered that the atomic nuclei contained neutral praticals that he called nuetrons
the mass number of an atom is the sum of the number of protons and nuetrons. Isotopes are atoms of the same element that have different mass numbers -
irene joliet curie
Irène Curie, born in Paris, September 12, 1897, was the daughter of Pierre and Marie Curie, and since 1926 the wife of Frédéric Joliot. In 1938 her research on the action of neutrons on the heavy elements, was an important step in the discovery of uranium fission. her and husband frederic dicover that they can change an isotope that was not radio active into a radioactive isotope. -
enrico fermi
Enrico Fermi was able to produce several new elements with atomic numbers greater than uranium. -
Enrico Fermi discovers nucleur fission was discovered
He built the first nucleur fission reactor in Chicago USA. Since then the nucleur fission reactors have grown in numbers supplying 17 % of the world's electricity. -
Atomic bombs in world war 2
The atomic bombings of the cities of Hiroshima and Nagasaki in Japan were conducted by the United States during the final stages of World War II in 1945. These two events represent the only use of nuclear weapons in war to date. Following a firebombing campaign that destroyed many Japanese cities, the Allies prepared for a costly invasion of Japan. The war in Europe ended when Nazi Germany signed its instrument of surrender on 8 May, but the Pacific War continued. Together with the United King -
candu reacters
The CANDU (short for CANada Deuterium Uranium) reactor is a Canadian-invented, pressurized heavy water reactor. The acronym refers to its deuterium-oxide (heavy water) moderator and its use of (originally, natural) uranium fuel. CANDU reactors were first developed in the late 1950s and 1960s by a partnership between Atomic Energy of Canada Limited (AECL), the Hydro-Electric Power Commission of Ontario (now Ontario Power Generation), Canadian General Electric (now GE Canada), and other companies. -
chernodyl
The Chernobyl disaster (Ukrainian: Чорнобильська катастрофа, Chornobylska Katastrofa – Chornobyl Catastrophe) was a catastrophic nuclear accident that occurred on 26 April 1986 at the Chernobyl Nuclear Power Plant in Ukraine (then officially Ukrainian SSR), which was under the direct jurisdiction of the central authorities of the Soviet Union. An explosion and fire released large quantities of radioactive particles into the atmosphere, which spread over much of Western USSR and Europe. The Che -
Radioactive waste
Radioactive wastes are wastes that contain radioactive material. Radioactive wastes are usually by-products of nuclear power generation and other applications of nuclear fission or nuclear technology, such as research and medicine. Radioactive waste is hazardous to most forms of life and the environment, and is regulated by government agencies in order to protect human health and the environment. Radioactivity diminishes over time, so waste is typically isolated and stored for a period of time
