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Lecture_16_Fission_and_Fusion - UNIT LECTURE 1 NOTES...

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U N I T 1 L E C T U R E N O T E S LECTURE 16 Nuclear Processes (19.6, 19.7, 19.9, & 19.10) GENERAL CHEMISTRY Fall 2009 Updated: 11/22/2011
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Nuclear Composition The radius of a nucleus is 10 -14 m, ten thousand times smaller than the radius of an atom. Nuclei are composed of two protons and neutrons, called nucleons. 19.6 Nuclear Energy The protons and neutrons are bound with forces much greater than chemical bond forces, reaching energies greater than 1 million times. There are two types of nuclear processes which produce energy: fission and fusion. 19.7 Nuclear Fission Heavy nuclides fragment in a process called fission. The process of fission was discovered in 1938 by Lise Meitner and Otto Hahn in Germany. The first atomic bomb was detonated in the New Mexico desert at 5:30 AM on July 16, 1945. A. Nuclear Fission 1. A very heavy nucleus splits into more stable nuclei of intermediate mass 2. The mass of the products is less than the mass of the reactants. Missing mass is converted to energy a. Small amounts of missing mass are converted to HUGE amounts of
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