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
CHEMICAL BONDING AND MOLECULAR STRUCTURE 103 When combining atoms share three electron pairs as in the case of two nitrogen atoms in the N 2 molecule and the two carbon atoms in the ethyne molecule, a triple bond is formed. 4.1.3 Lewis Representation of Simple Molecules (the Lewis Structures) The Lewis dot structures pr ovide a pictur e
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