NTA Abhyas JEE Main2020ChemistryClassification of Elements and Periodicity in PropertiesPractice

Which among the following elements have lowest value of IE 1 ?

Options

Correct answer

B. Sn

Step-by-step solution

Ionisation energy of carbon group follows the order C   >   Si   >   Ge   >   Pb   >   Sn . IE Pb > IE Sn because of poor shielding effect of electrons resulting in lanthanide contraction.

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