Write short notes on the changes in atomic and ionic sizes and ionization enthalpy of transition metals.
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Solution and Explanation
Atomic and Ionic Size: Across a period, atomic size slightly decreases due to poor shielding by d-electrons. Down a group, size increases due to the addition of a new energy level.
Ionization Enthalpy: Transition metals have higher ionization enthalpy due to their small size and nuclear attraction. \item Ionization energy does not increase significantly across the series because of screening effects.
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