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Compare the ionization enthalpies of first series of the transition elements. |
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Answer» SOLUTION :Ionization enthalpies of first transition series: (i) Ionization energy of transition element is intermediate between those of s and p block elements. (ii) As we move from LEFT to right in a transition metal series, the ionization ENTHALPY increases as expected. This is due to INCREASE in nuclear charge corresponding to the filling of d electrons. (iii) The increase in first ionisation enthalpy with increase in atomic number along a particular series is not regular. The added electron enters (n-1)d orbital and the inner electrons act as a shield and decrease the effect of nuclear charge on valence ns. electrons. Therefore, it leads to VARIATION in the ionization energy values. |
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