FREE ESSAY ON NIELS BOHR

NIELS BOHR

October 21, 1998
Niels Bohr
Niels Bohr was born in Copenhagen, he is the son of a physiology professor, and went to
school at the University of Copenhagen, this is where he got his doctorate in 1911.
Bohr won the Nobel piece prize for his theory of atomic structures. According to
Microsoft Encarta His work drew on Rutherford's nuclear model of the atom, in which the
atom is seen as a compact nucleus surrounded by a swarm of much lighter electrons. He
thought that electrons are arranged in definite shells, or quantum levels, at a big
distance from the nucleus. The arrangement of these electrons is called the electron
configuration. The number of these electrons equals the atomic number if the atom;
hydrogen has a single electron, helium has 2, and uranium has 92. The electron shells are
built from a first shell to a total of seven shells. The first shell is complete with two
electrons, the second can hold up to eight electrons, and the following shells hold
larger numbers. The last electrons determine the chemical behavior of the atom.