Question:
Explain why is there a phenomenal decrease in ionization enthalpy from carbon to silicon ?
Answer:
There a hugel decrease in ionization enthalpy from carbon to silicon because of increase in atomic size as we go down the group and also due to screening effect. The force of attraction between the nucleus and the valence electrons (effective nuclear charge) decreases in silicon as compared to carbon. Therfeore there is a great decrease in ionization enthalpy from carbon to silicon.
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