Transcription of CHEMICAL BONDING AND MOLECULAR STRUCTURE
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CHEMICAL BONDING AND MOLECULAR STRUCTURE
100 CHEMISTRYS cientists are constantly discovering new compounds, orderlyarranging the facts about them, trying to explain with theexisting knowledge, organising to modify the earlier views orevolve theories for explaining the newly observed 4 After studying this Unit, you will beable to understand K ssel-Lewisapproach to CHEMICAL BONDING ; explain the octet rule and itslimitations, draw Lewisstructures of simple molecules; explain the formation of differenttypes of bonds; describe the VSEPR theory andpredict the geometry of simplemolecules; explain the valence bondapproach for the formation ofcovalent bonds; predict the directional propertiesof covalent bonds; explain the different types ofhybridisation involving s, p andd orbitals and draw shapes ofsimple covalent molecules; describe the MOLECULAR orbitaltheory of homonuclear diatomicmolecules; explain the concept of BONDING ANDMOLECULAR STRUCTUREM atter is made up of one or different type of normal conditions no other element exists as anindependent atom in nature, except noble gases.
by electr on transfer and the for mation of ionic crystalline compounds. His views have pr oved to be of gr eat value in the understanding and systematisation of the ionic compounds. At the same time he did recognise the fact that a lar ge number of compounds did not fit into these concepts. 4.1.1 Octet Rule Kössel and Lewis in 1916 developed an
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