Niels Bohr

1
Niels Bohr

•  
• Elizabeth Cline Christine Nieto
• Lorena Valenzuela Julia Valenzuela
• CNV2 o) 

Niels Bohr and Albert Einstein debating quantum
theory
2
(No Transcript)
3
Biography 

• Niels Henrik David Bohr (October 1885  18
  November 1962)
•  
•  Born in Copenhagen, Denmark.
•  
• His father, Christian Bohr, was professor of
  physiology at the University of Copenhagen (it is
  his name which is given to the Bohr shift or Bohr
  effect).
•  
• His mother, Ellen Adler Bohr, came from a wealthy
  Jewish family prominent in Danish banking and
  parliamentary circles.

4
Discovery

• The Bohr model, introduced by Niels Bohr in 1913,
  depicts the atom as a small, positively charged
  nucleus surrounded by electrons that travel in
  circular orbits around the nucleus.  The
  electrons move in spherical orbits at fixed
  distances from the nucleus.
•  Similar in structure to the solar system, but
  with electrostatic forces providing attraction,
  rather than gravity.
• Bohr's model focused on electrons.  A description
  of the arrangement of electrons in an atom is the
  center piece of the modern atomic model.
•  Niels Bohr's model is a correction of Ernest
  Rutherford model.  Rutherford's model states that
  an atom has a dense positively charged nucleus.
  Electrons move randomly in the space around the
  nucleus.       
•  
•  
•  

5
Experiments

• As a post-doctoral student, Bohr first conducted
  experiments under J. J. Thomson, of Trinity
  College, Cambridge and Cavendish Laboratory. In
  1912 he met and later joined Ernest Rutherford at
  Manchester University, where on and off he spent
  four fruitful years in association with the older
  physics professor. In 1916, Bohr returned
  permanently to the University of Copenhagen,
  where he was appointed to the Chair of
  Theoretical Physics, a position created
  especially for him. In 1918 he began efforts to
  establish the University Institute of Theoretical
  Physics, which he later directed.

6
Videos

• Here is a video that outlines Neils Bohr and his
  discoveries.
• http//www.youtube.com/embed/F3PO4GOZKAs
• http//www.youtube.com/embed/Cn6v5ygyZHQ
•  

7
Biblography

• "Niels Bohr" Retrieved on January 24, 2012. From
  http//en.wikipedia.org/wiki/Niels_Bohr
•  
• "Niels Bohr's Atomic Model " Retrieved on January
  24, 2012. From http//www.youtube.com/watch?vCn6v
  5ygyZHQfeatureyoutu.be