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SUBJECT-CHEMISTRY


                            CHAPTER-CHEMICAL BONDING R MOLECULAR STRUCTURE


               SUBTOPIC- Bond parameters,polar character of a covalent bond,covalent
               character of ionic bond.


               KEY NOTES :


                    Bond length-Bond length is defined as the equilibrium

                       distance between the nuclei of two bonded atoms in a
                       molecule.


                    Bond enthalpy-It is defined as the amount of energy required
                       to break one mole of bonds of a particular type between two
                       atoms in a gaseous state.


                    Bond angle-It is defined as the angle between the orbitals
                       containing bonding electron pairs around the central atom in a
                       molecule/complex ion.


                    Bond order-In the Lewis description of covalent bond, the
                       Bond Order is given by the number of bonds between the two
                       atoms in a molecule.


                    Isoelectronic molecules and ions have identical bond
                       orders; for example, F2 and O2  have bond order 1. N2, CO
                                                                   2–
                       and NO+ have bond order 3.

                     Dipole moment-It is defined as the product of charge on the
                       constituent atoms and the distance between them.

                           D.M=Charge x  distance
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