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Understand The Atomic Structure Through Bhor's Atomic Model.
By Nilima Sutrave
In the field of Electronics Engineering,the study of atomic structure is most important in view to understand the conductivity material etc...If you know the atomic structure of any metal then you better know the electrical conductivity of that metal.That will help you to choose as conductors,semi conductors or insulators. As you know,the size of an Atom is so small that it is most impossible to see it even with the most powerful microscope.Therefore,we have to employ indirect method for the study of its structure.Different scientists have given different theories regarding the structure of Atom.Out of that theories Bhor's Atomic Model is most adequate for understanding electronics subject.Although various refinements have since been made on Bhor's Atomic Model,we still believe in the law the Bhor applied to the atomic world.You can better understand the problems facing to electronics world by this model. What is Bhor's Atomic Model? According to Bhor, 01)An atom consists of a positively charged nucleus around which negatively charged electrons revolve in different circular orbits. 02)The electrons can revolve round the nucleus only in certain permitted orbits. 03)The electrons in each permitted orbit have a certain fixed amount of energy of electrons. 04)If an electron is given additional energy,it is lifted to higher orbit.The atom is said to bein a state of excitation.This state does not last long,because the
electron soon falls back to the original lower orbit.As it falls,it gives back the acquired energy in the form of heat,light or other radiations. To better explain you Bhor's Atomic Model,I choose Silicon Atom as an example.It has 14 electrons.2 electrons revolve in the first orbit, 8 electrons in the second orbit and 4 in the third orbit.These electrons can revolve only in permitted orbits and not in any arbitrary orbit.Each orbit has fixed amount of energy associated with it.We can lift an electron from first orbit to second orbit by applying the energy (so that its total energy is equal to that of second orbit).When this lifted electron jumps from the second orbit to first.It will give back the acquired energy in the form of electromagnetic radiations. So,from above description,you understand that each orbit has fixed amount of energy associated with it.Every orbit posses some energy level.The larger the orbit,the greater is its energy.It means,outer orbit electrons posses more energy than the inner orbit electrons.You may refer energy level diagram to better understand about energy level.There are different energy levels for different material atom structure other than silicon atom.You may find it by searching on net through search engine. The remaining part of this automic model will be covered in next posts. For more,please visit
http://elctronicsengineering.blogspot.com/
This intel first appeared on: http://elctronicsengineering.blogspot.com/
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