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Explain ionisation enthalpy of group 14 ...

Explain ionisation enthalpy of group 14 elements .

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The first ionisation enthalpies of the elements of group 14 are higher than those of the corresponding group 13 elements due to greater nuclear charges and smaller atomic sizes . The variation in the first ionisation enthalpy of the elements of group 14 moving down the group is `C gt Si gt Sn lt Pb.`
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