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Explain why is there a phenomenal decrea...

Explain why is there a phenomenal decrease in ionisation enthalpy from carbon to silicon?

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Due to increase in atomic size and screening effect, the force of attraction of the nucleus for the valence electron decreases considerably in Si as compared to C. As a result , there is a phenomenal decreases in ionization enthalpy from carbon to silicon .
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PRADEEP-SOME p-BLOCK ELEMENTS-NCERT QUESTIONS AND EXERCISES WITH ANSWERS (NCERT INTEXT SOLVED QUESTIONS)
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