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प्रश्न
Compare the ionization enthalpies of the first series of the transition elements.
उत्तर
Ionization enthalpies of first transition series:
- Ionization energy of the transition element is intermediate between those of s and p block elements.
- As we move from left to right in a transition metal series, the ionization enthalpy increases as expected. This is due to an increase in nuclear charge corresponding to the filling of d electrons.
- 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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