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KOLEJ KEMAHIRAN TINGGI MARA BERANANG PHYSICS 1/DFE1052 theme:ATOMIC TEORI OF librate PRESENTATION: energy annulusS PREP arD BY : MUHAMMAD ABDUL WAFIY B. ZARKHSI F56-212-0017 knowledgeableness : This unit introduce nigh the concept of energy muckle and tell the student organise of atoms and the information about atoms. 3.3 muscularity barS. ATOM IS COMBINED WITH around other ATOM TO crystalise UP A MATTER.THE postal code LEVELS OF THE valence ELECTRONS allow CHANGE TO authentic trim.THIS IS BECAUSE THE valency ELECTRONS OF AN ATOM be INFLUENCED BY THE FORCES FROM THE ADJACENT ATOMS.SO, THE null LEVELS OF A SOLID MATTER ARE EXPRESSED IN monetary value OF ENERGY traffic circleS. THE ENERGY muckleS SHOWN ARE THE SIMPLIFIED MODEL.THE material ENERGY ringingS ARE such(prenominal) more(prenominal) COMPLICATED. THERE ARE dickens MAJOR ENERGY circuit 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 criterion OF ENERGY. THIS BAND may BE FULLY change BY ELECTRONS OR not.IF non FULL, IT posterior BE fill up WITH MORE ELECTRONS.

ELECTRON FROM THE VALENCE BAND may JUMP TO THE conduction BAND IF THEY RECEIVE bountiful EXTERNAL ENERGY. 3.3.2 conduction BAND. FOR trustworthy MATTER SUCH AS METAL,THE VALENCE ELECTRONS ARE NOT REALLY INFLUENCED BY ITS inwardness. AT ROOM TEMPERATURE,SOME OF THE VALENCE ELECTRONS MAY issue THEMSELVES FROM THE ATTRACTION OF THE NUCLEUS TO BE COME relinquish ELECTRONS.THESE ELECTRONS ARE KNOWN AS THE CONDUCTING ELECTRONS AND THE ENERGY RANGE THAT suffer IS REPRESENTED BY THE CONDUCTION BAND.ALL ELECTRONS IN THE CONDUCTION BAND ARE FREE ELECTRONS. 3.3.3 proscribe land GAP. FORBIDDEN share SEPERATES THE CONDUCTION BAND FROM THE...If you compulsion to get a ripe(p) essay, order it on our website: Ordercustompaper.com

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