NIELS BOHR

1885-1962

created by Brenda Munoz, Ryan Harris and Kyle Stewart
Period 8

dedicated to Mrs. Forehand
<3

"Anyone who is not shocked by quantum theory has not understood it" -Bohr

YEAR and PLACE OF DISCOVERY

1913 at Manchester with the help of Ernest Rutherford (English physicist)

ATOMIC MODEL

IMPORTANT FACTS ON DISCOVERY

-Bohr's model improved the classical atomic model greatly by incorporating quantum theory (Planck's Quantum Theory)

-Bohr proposed that electrons existed only in certain orbits and that they made leaps/jumps between orbits instead of traveling between them as previously thought.

-In his model, the most stable and lowest energy level is found in the innermost orbit that forms a shell around the nucleus and has its own principal quantum number. He concluded from this that sub shells/sub-orbits with different shapes and arrangements gave each element a unique electron configuration

-He declared electrons could orbit the nucleus but only in discrete orbits that didn't emit radiation

-He discovered that an electron moves to a higher orbit with a larger radius by absorbing radiation. It will then emit a photon of energy when the electron moves to a lower orbit with a smaller radius.

-His model explained important properties of the photoelectric effect by Albert Einstein

-His model is fundamental to chemistry since it's valence shell concept can predict an element's reactive properties

RANDOM FACTS ON BOHR

~Niels Bohr received a Nobel prize in physics for his discovery of atomic structure and quantum theory in 1922

~Bohr founded the Institute for Theoretical Physics at the University of Copenhagen in 1920

~His father was a professor of physiology at the University of Copenhagen

~Bohr became interested in physics at an early age from listening to scientific discussion his father and his friends had every week

~Bohr majored in physics at the University of Copenhagen in Denmark

CITATIONS

"Bohr model." The Gale Encyclopedia of Science. Ed. K. Lee Lerner and Brenda Wilmoth Lerner. 5th ed. Farmington Hills, MI: Gale, 2014. Science In Context. Web. 11 Oct. 2014.Document URL
http://go.galegroup.com/ps/i.do?id=GALE%7CCV221007...

"Bohr Model." World of Earth Science. Ed. K. Lee Lerner and Brenda Wilmoth Lerner. Vol. 1. Detroit: Gale, 2003. 75-76. Gale Virtual Reference Library. Web. 9 Oct. 2014.Document URL

http://go.galegroup.com/ps/i.do?id=GALE%7CCX343780...

"Bohr, Niels (1885-1962)." World of Earth Science. Ed. K. Lee Lerner and Brenda Wilmoth Lerner. Vol. 1. Detroit: Gale, 2003. 76-79. Gale Virtual Reference Library. Web. 10 Oct. 2014.Document URL

http://go.galegroup.com/ps/i.do?id=GALE%7CCX343780...

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