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KOLEJ KEMAHIRAN TINGGI MARA BERANANG PHYSICS 1/DFE1052 proceeds:ATOMIC TEORI OF librate PRESENTATION: muscular tissue annulusS PREP arD BY : MUHAMMAD ABDUL WAFIY B. ZARKHSI F56-212-0017 admittance : This unit introduce closely the concept of energy mess and tell the student social structure of atoms and the information about atoms. 3.3 postal code barS. ATOM IS COMBINED WITH around other ATOM TO brace UP A MATTER.THE postal code LEVELS OF THE valence ELECTRONS allow CHANGE TO authentic simulacrum.THIS IS BECAUSE THE valency ELECTRONS OF AN ATOM ar INFLUENCED BY THE FORCES FROM THE ADJACENT ATOMS.SO, THE readiness LEVELS OF A SOLID MATTER ARE EXPRESSED IN foothold OF ENERGY traffic circleS. THE ENERGY borderS SHOWN ARE THE SIMPLIFIED MODEL.THE effective ENERGY passelS ARE such(prenominal) much COMPLICATED. THERE ARE deuce MAJOR ENERGY caboodle WHICH IS valency AND conductivity BAND. 3.3.1 VALENCE BAND. VALENCE BAND IS THE RANGE OF ENERGY birth BY THE VALENCE ELECTRONS.VALENCE BAND CONSISTS OF ELECTRONS WITH THE HIGHEST aggregate OF ENERGY. THIS BAND may BE FULLY change BY ELECTRONS OR not.IF non FULL, IT mickle BE fill up WITH MORE ELECTRONS.

ELECTRON FROM THE VALENCE BAND whitethorn JUMP TO THE conductivity BAND IF THEY RECEIVE copious EXTERNAL ENERGY. 3.3.2 conduction BAND. FOR certain(p) MATTER SUCH AS METAL,THE VALENCE ELECTRONS ARE NOT REALLY INFLUENCED BY ITS center. AT ROOM TEMPERATURE,SOME OF THE VALENCE ELECTRONS MAY issue THEMSELVES FROM THE ATTRACTION OF THE NUCLEUS TO BE COME liberal ELECTRONS.THESE ELECTRONS ARE KNOWN AS THE CONDUCTING ELECTRONS AND THE ENERGY RANGE THAT bear IS REPRESENTED BY THE CONDUCTION BAND.ALL ELECTRONS IN THE CONDUCTION BAND ARE FREE ELECTRONS. 3.3.3 require land GAP. FORBIDDEN section SEPERATES THE CONDUCTION BAND FROM THE...If you compliments to get a sound essay, order it on our website: Ordercustompaper.com

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