25 Nov 2011

PRAZZER- Atom Bohr Model



Bohr Atom ModelThe fourth model of the atom which we will discuss the Bohr atom model. In 1913, Danish physicist named Neils Bohr atom Rutherford repair failures through experiments on the hydrogen atom spectrum. These experiments successfully gives an overview of state of electrons occupying the area around the atomic nucleus.Bohr's explanation of the hydrogen atom involves a combination of the classical theory of Rutherford and of Planck's quantum theory, expressed by four postulates, as follows:There are only a certain set of orbits are allowed for one electron in a hydrogen atom. Orbit is known as a state of stationary motion (settling) of electrons and is a circular path around the nucleus;As long as the electrons are in stationary trajectory, the electron energy remains so there is no energy in the form of radiation emitted or absorbed;Electrons can only move from one stationary trajectory into another stationary trajectory. In this transition, a certain amount of energy involved, the amount in accordance with Planck equation, ΔE = hv;Stationary trajectory is allowed to have the scale with certain properties, especially a property called angular momentum. The amount of angular momentum is a multiple of h/2Π or nh/2Π, where n is an integer and h Planck constant.
According to Bohr's atomic model, the electrons surrounding the nucleus in certain paths called electron shells or energy levels. Lowest energy level is the electron shell which is located in, getting out of her skin and the greater the number the higher the energy level.
Bohr Atom Model
For Bohr atom model is more interesting, a friend can view the animation by clicking Animation to this Bohr Atomic Model.

Experiments Bohr







Excess Bohr Atomic ModelBohr atom is that the atom consists of a few skins for the transfer of electrons.
Weaknesses Bohr Atomic ModelThis atomic model is not able to explain the Zeeman effect and the effect of Strack.
To download the file percentage of Bohr's atomic model, the friend can click the link to this Bohr Atomic Model. Files obtained from physicsline.