Chemistry - PERIODIC TABLE Question with Solution | TestHub

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