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Ernest Rutherford

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on 25 September 2013

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Transcript of Ernest Rutherford

Ernest Rutherford
Model of Atom
Ernest Rutherford publishes his atomic theory describing the atom as having a central positive nucleus surrounded by negative orbiting electrons. This model suggested 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. Rutherford came to this conclusion following the results of his famous gold foil experiment. This experiment involved the firing of radioactive particles through minutely thin metal foils and detecting them using screens coated with zinc sulfide.
Sources
Nobel Prizes and Laureates. (2013, September). Ernest Rutherford- Biograhical. Retrieved from www.nobelprize.org/nobel-prizes
Chemical Hertiage Foundation.(2010). Ernest Rutherford. Retrieved from www.chemicalheritage.org/discorver/online-resources
Kiwi Web.(2011). Who was Ernest Rutherford? Retrieved from www.chemistry.co.nz
Oracle Think Quest.(2000). Discovery of the Nucleus. Retrieved from www.library.thinkquest.org/history
Ernest Rutherford was always known as the "father of physics". Ernest was born on August 30, 1861, in Nelson, New Zealand. He was the fourth child out of his twelve brothers and sisters. His father James Rutherofrd was a Scottish wheelwright, while his mother Martha was a schoolteacher. Rutherford was mostly known for his Nobel Peace Prize in Chemistry.
Biography
Studies
Ernest graduated M.A. in 1893 with mathematics and physical science. He continued his research work for a short time while having many opportunities at McGill. Rutherford continued at McGill on his work of alpha rays, particularly radioactive bodies. Later, he studies with R.B. Owens on the "emanation of thorium". and discovered a noble gas. Fredrick Soddy was also at McGill and collaborated with Ernest in creating the " disintegration theory" of the radioactive atomic process. He also studied radium emanation with the association of H.
Geiger.
Other Scientist
Discovery
Rutherford's work constituted a landmark in hsitory of atomic research through the development of Bacquerel's discover of radioactivity into exact proof of atoms. He established the thory of ht enuclear atom and carried out the transmutation reaction in 1919. Rutherford also discovered half-life of radioactive elements, included that materials experience decay as time passes by. Through his research, he said that the atom was not the smallest unit of mass and it included protons, neutron, and electrons in the nucleus.
Erest Rutherford's discoveries
To understand radioactivity, you have to understand the atom. In this experiment Ernest bombarded the gold foil with alpha particles from an atomic source. He discovered the nucleus by scattering particles to run to a dense concentrated area to bound in 1899. This discovery was known when Hans Geiger, his assistant, noticed an angle greater than 10 degrees than expected.
How did he do this discovery?
J.J Thompson's effort to estimate the number of electrons in an atom from scattering lights, X, beta, and gamma rays initiated the research trajectory of one of his students Ernest Rutherford. Rutherford eventually joined Thompson's ongoing investigation of the conduction of gases with electricity.
Hans Geiger and Ernest Rutherford carried out the Marsden experiment to examine the structure of the atom. Results of the experiment demonstrated existence of the atomic nucleus. In 1911,Rutherford performed an experiment for the theory of the plum pudding model. The electrons were chunks of plum distributed through a positive charge sphere of pudding.
Conducted Experiments
Atom Models
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