Atomic Energy Levels

Atomic Energy Levels - 1. ,.However .

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Atomic Energy Levels and Spectra 1. Energy Levels of Electrons According to the Bohr model, an atom consists of electrons orbiting around a nucleus. However,  the electrons cannot choose any orbit they wish.  This is called quantization  of energy levels –  that is it refers to the discrete nature of the energy level n.  In other words the electrons are  restricted to orbits with only certain energies designated as E n  where n represents the energy  level.  Electrons can jump from one energy level  to another (eg. n=1 to n= 3), but they can  never have orbits with energies other than the allowed energy levels (see Text Fig. 18.19 p.  399). Each type of atom has a discrete set of energy levels with energy E n .  For the hydrogen atom E is given by the following formula: E n  = - hRc/n 2   where n =1,2 ,3 …… The constants c, h and R are called the speed of light, Planck’s and Rydberg’s constant  respectively and have values c=3x10 8  m/s , h=4.14x10 -15  eVs and R= 1.097x10 7  m -1 For example, for hydrogen’s second lowest energy level E
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This note was uploaded on 11/13/2010 for the course CODS 690 taught by Professor Tsi during the Spring '10 term at WPUNJ.

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Atomic Energy Levels - 1. ,.However .

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