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Explain on what factors the ionization enthalpies of elements having d^(10) configuration depends upon? |
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Answer» Solution :The ionization enthalpy depends on THREE factors. (i) Nucleus- electron attraction (ii) Electron - Electron repulsion (iii) Exchange ENERGY Exchange energy is responsible for the stabilization of the energy state. It is approximately PROPORTIONAL to the toal number of possible pairs of parallel spin degenerate orbitals. When a several electrons occupy a set of degenerate orbitals, the lowest energy state CORRESPONDS to the maximum possible extent of single occupation of orbitals and parallel spinds (Hund.s Rule). The loss of exchange energy increases the stability and HENCE the ionization enthalpy increases. |
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