Bohr’s Atomic Theory
Lauren Simonton
Mary Heim
Krystal Reese
Hope Dubbs
Bohr’s Background
•
•
•
•
•
•
•
Born: October 7,1885.
Died: November 18, 1962.
In the fall of 1911 he worked under Sir.
J.J. Thomson.
In the spring of 1912 he was working
with Professor Rutherford’s laboratory
in Manchester.
In 1922 he was awarded the noble
prize for developing the Bohr Theory of
the atom.
During World War II, Bohr fled
Copenhagen to escape the Nazis. He
traveled to Los Alamos, New Mexico to
advise the scientist developing the first
atomic bomb.
He returned to Copenhagen after the
war and later promoted the peaceful
use of atomic energy.
An earlier theory
• Rutherford:born on August 30,
1871, in Nelson, New Zealand.
• Discovered the inner nature of an
atom. Which he called the
nucleus.
• Showed that the atoms consisted
of a positively charged nucleus
and has negatively charged
electrons in orbit around it.
Theory
•
•
•
•
•
Published a theory about the structure of the atom based on an earlier theory of
Rutherford.
Bohr expanded upon this theory by proposing that electrons travel only in certain
successively larger orbits. He suggested that the outer orbits could have more
electrons than the inner ones, and that these outer orbits determine the atoms
chemical property.
He also described the way atoms emit radiation by suggesting that when an electron
jumps from an outer orbit to an inner orbit, that it emits light.
He constructed the first quantum model for the internal structure of the atom.
In the 1920’s Bohr’s Theory became the basis for quantum mechanics’ which
explained in greater detail the complex structure and behavior of atoms.
Planetary Model
Later Theory
•
•
•
Later on physicists expanded his theory into quantum mechanics. This
theory explains the structure and actions of complex atoms.
Quantum theory, modern physical theory concerned with the emission and
absorption of energy by matter and with the motion of material particles.
The quantum theory and the theory of relativity together form the theoretical
basis of modern physics. Just as the theory of relativity assumes
importance in the special situation where very large speeds are involved, so
the quantum theory is necessary for the special situation where very small
quantities are involved, i.e., on the scale of molecules, atoms, and
elementary particles.
Work Cited
•
•
Www.lucidcafe.com/library/95oct/nbohr.html
www.suite101.com/blog/telstar/niels_bohr_danish_physicist
•
•
•
http://nobelprize.org/nobel_prizes/chemistry/laureates/1908/rutherford-bio.html
http://www.infoplease.com/ipa/A0905226.html
http://www.infoplease.com/ce6/sci/A0840721.html