By Greg Schweiker and Josh Helzner
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 Nuclear fission is when a reaction in the nucleus causes a split into two lighter nuclei
 Occurs when a nucleus has too many protons and neutrons to stay stable.
 The mass is converted into energy.
 To undergo fission you need a heavy nuclei.
Lighter nuclei go through another process called fusion.

 There needs to be a critical mass (Critical-having enough mass to sustain a reaction).
 Has to have high speed neutrons, will no work with low speed neutrons.
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 Born in Vienna, Austria on November 7th, 1878
 Went to University of Vienna
 Was one of the people to discover nuclear fission. She unleashed the possibility of the nuclear reactor.
 Her discoveries led to the development of the atomic bomb.

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Born in Frankfurt, Germany on March 8 th , 1879
Went to Humboldt University of Berlin
Published the first report on his discovery of the
Uranium Z.
Partner of Lise Meitner for a short time.
Considered the “Father of
Nuclear Chemistry”.
Won the Nobel Prize in 1944 for his discovery and work on nuclear fission.

 Born in Budapest, Austria-Hungary on February
11, 1898
 Studied at Humboldt University of Berlin
 Worked on the first nuclear reactor, and the atomic bomb.
 One of the first scientists to realize the true power, and dangers nuclear reactions may have.

 Discovered on December 17, 1938 By Otto Hahn and Fritz Strassman (Assistant).
 Found when they bombarded Uranium-235 with neutrons.
 Lise Meitner wrote explanation of this new reaction and coined the term “fission”.
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 Otto Hahn and Strassman were performing extra tests on the bombarded uranium.
 Lise and Hahn predicted that the experiment would result in the element radium, but it instead ended with the lighter elements of barium and krypton.
 Hahn realized that the uranium atoms split into much smaller atoms.
 This split released neutrons and a very large amount of energy. There was also a loss of some mass.
 Meitner expected a release of energy due to Einstein's famous equation, E= mc 2 .
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 Nuclear weapons, atomic bombs, and power plants (Used Cautiously).
 Nuclear fission of uranium is used in nuclear reactors due to its ability to contain a nuclear chain.
 This nuclear chain allows the molecules to sustain themselves.
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 Nuclear Fusion- A nuclear reaction when atomic nuclei of a low atomic number fuse together to form a heavy nucleus with the release of energy
 Nuclear fusion is seen in stars, supernovas, and the sun.
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 The energy released in nuclear fusion is about three to four times greater than fission.
 Nuclear fusion is safer than fission
 It is, however, more difficult to perform.
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 http://ansnuclearcafe.org/2012/02/14/lisemeitners-fantastic-explanation-nuclear-fission/
 http://chemwiki.ucdavis.edu/Physical_Chemistry/N uclear_Chemistry/Fission_and_Fusion
 http://www.diffen.com/difference/Nuclear_Fission_ vs_Nuclear_Fusion
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