Bohrs Model of the Atom

1
Bohrs Model of the Atom

• We Promise Not To Bohr You.

The description of the electrons arrangement in
an atom is the centerpiece of the modern atomic
model.
By Alan Cone, Aimee Connelly, and Caleb Berlon
2
The Life of Niels Bohr
Picture Credits http//www.a-i-f.it/STORIA/Immagi
ni/sito20aif20storia20della20fisica/Bohr.jpg

• Lived from 1885 to 1962, dieing at age 77.
• Son of Christian Bohr, a professor of physiology
  at the University of Copenhagen.
• Him and his brother Harald Bohr, a mathematician
  were passionate soccer players.
• Received his doctorate from Copenhagen
  University, then studied under Ernest Rutherford
  in the Victoria University of Manchester in
  England.
• Won the Nobel Prize for Physics in 1922 for all
  his work.
• Niels Bohr and his wife Margrethe Nørlund had six
  children. Two died young and most of the others
  lead good lives. Aage Bohr became a very
  successful physicist and also won a Nobel Prize.

3
The Model of an Atom

• Based on ideas from Rutherfords model
• Focused more on electrons
• Electrons had energy levels
• Electrons move with constant speed around the
  Nucleus like our solar system does.

4
Energy Levels
Like a volume control, energy levels can only go
up or down in whole steps.

• Can only change in whole increments, electrons
  cannot exist between two energy levels, like a
  volume control, only whole steps.
• Change with the energy of the atom, goes up with
  more energy, level is lowered with less.
• When changing to a lower level, energy is let
  out. That explains the colors in fireworks.
• Different elements release different colors of
  light (like fireworks) and emit energy different
  ways.

Fireworks, emiting light because of the atoms
losing energy as they lose the energy gained by
heat when exploding.
http//images.encarta.msn.com/xrefmedia/sharemed/t
argets/images/pho/t048/T048749A.jpg