The p-Block Elements — Chemistry STD 11 Science — Question
Gujarat BoardEnglish MediumSTD 11 ScienceChemistryThe p-Block Elements2 Marks
Question
Explain why is there a phenomenal decrease in ionization enthalpy from carbon to silicon?
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Answer
Ionisation enthalpy of carbon (the first element of group 14) is very high (1086kJ/ mol). This is expected owing to its small size. However, on moving down the group to silicon, there is a sharp decrease in the enthalpy (786kJ). This is because of an appreciable increase in the atomic sizes of elements on moving down the group.
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