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Bohr Model

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by Naimul Islam on 17 September 2013

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Transcript of Bohr Model

Electrons can exist only in certain orbits—at certain distances from the nucleus
Electrons make instantaneous (quantum) leaps or jumps between allowed orbits, and project certain amounts of energy, emitting different spectrum (depending on the location of the orbit)
The first orbit can hold up to 2 electrons, the second up to 8 electrons, the third orbit up to 18 electrons
The lowest, most-stable energy level is the innermost orbit
Electrons become less stable moving away from the nucleus
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Chemistry 1B


September 11, 2013

Scientific Issues addressed with the Bohr Model
Relevant Scientists
Niels Bohr Ernest Rutherford
Descriptions of Scientific Laws/Principles
The Impact the Model had on Chemistry
Social Factors:
Bohr Model built on previous models
Model improved classical atomic models of J. J. Thompson and Ernest Rutherford through quantum theory

Ethical Factors:
Bohr's work was considered the earliest "major attempts to apply quantum theory to atomic structures" (World of Chemistry).
Some scientists, including Albert Einstein, were very upset with Bohr's Model and theories.

Cultural Factors:
"When Denmark was overrun and occupied by the Germans in 1940, Bohr did what he could to maintain the work of his institute and to preserve the integrity of Danish culture against Nazi influences" (Bohr, Niels).
The Benefits & Limitations of the Bohr Model
Benefits
Provided useful views on atoms - Showed the ways atoms behaved
Created a model and showed what an atom might look like
Introduced quantum principles - electrons jumping between orbits

Limitations
Does not work for atoms containing more than one electron
Does not predict the intensity of the photons (particles of light) that are emitted when an electron changes orbits
Presented By: Naimul I.,Jannah M.,James R.,Maxime K.
http://ic.galegroup.com/ic/scic/DocumentDispatcherPage/DocumentDispatcherWindow?action=1&javax.portlet.action=doForward&windowstate=normal&documentId=GALE|CV2210078073&mode=view
Pictures of the Bohr Model
http://www.tutordynamic.com/admin/photos/bohr-model-of-atom.jpg
Pictures of Bohr's Model
The End!
Bohr Model
Works Cited
Courtesy of Clip Art on Prezi.
K., Lerner Lee. "Physics: The Bohr Model." Scientific Thought: In Context. Ed. K. Lee
Lerner and Brenda Wilmoth Lerner. Vol. 2. Detroit: Gale, 2009. 882-885. In Context
Series. Gale Virtual Reference Library. Web. 11 Sept. 2013.
"Bohr, Niels." Bohr, Niels. Encyclopedia Britannica, Inc., Web. 16 Sept. 2013.
"Bohr theory." World of Chemistry. Gale, 2006. Science In Context. Web. 16 Sept. 2013.
"Bohr model." The Gale Encyclopedia of Science. Ed. K. Lee Lerner and Brenda Wilmoth
Lerner. 4th ed. Detroit: Gale, 2008. Science In Context. Web. 16 Sept. 2013.
Picture Citations
Bohr Model. Digital image. Science in Context. GALE. Web. 16 Sept. 2013.
Bohr Model of Atom. Digital image. Tutordynamic.com. Web. 16 Sept. 2013.
Ernest Rutherford. Digital image. Wikipedia.org. Web. 16 Sept. 2013.
Neils Bohr. Digital image. Wikipedia.org. Web. 16 Sept. 2013.
The Bohr model was conceived to deal with discrete atomic energy levels
Bohr researched this theorem also because he wanted to understand atoms via light.
Different things turn different colours when heated - why?
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