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For a stable molecule the value of bond order must be |
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Answer» zero = (no. Bonding electrons) -(no. Of antibonding electrons)/(2) The electrons in the bonding MOLECULAR orbital leads to lowering in energy and hence stability whereas in antibonding molecular orbital leads to destability. (i) (-ve) bond order `Rightarrow` greater number of electrons in antibonding molecular orbital than bonding molecular orbital.Therefore molecule is less stable compared to the separated atoms. 0 bond order `rightarrow` number of bonding molecular orbital = number of antibonding molecular orbital.Therefore there is no gain in energyy in forming the molecule. (+ve) bond order `rightarrow` number of electrons in bonding molecular orbital is more than those in antibonding molecular orbital.Therefore ther is a gain in enrgy while the bonding TAKES place. |
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