The IP1, IP2, IP3, IP4 and IP5 of an element are 7.1, 14.3, 34.5, 46.8, 162.2 eV respectively. The element is likely to be -
Si
Among the I.P given there is a huge jump from I.P4 to I.P5, which shows that element attains stable inert gas configuration after loosing 4 electrons. It should be an element from 14th group (IVA),Si