Question

The Ip1,Ip2,Ip3,Ip4,Ip5, of an element are 7.1,14.3,34.5,46.8,162.2eV respectively.the element is likely to be

Answer 1

It is silicon...
electronic configuration: 1s^2 2s^2 2p^6 3s^2 3p^2
because when you are removing the 4 electrons from shell 3, small changes in ip are seen, but as soon as you remove an electron from stable configuration (1s^2 2s^2 2p^6), the change is drastic.

Hope it helps!

Answer 2

Answer:

Si

Explanation:

The element is likely to be Si. The jump in IP values exist in IP 5 and thus, removal of fifth electron occurs from inner shell. Thus, the element contains four electrons in its valence shell.

The electronic configuration of silicon is {Ne}3s2 ,2p 2

,3p 2 . These 4 electrons need lesser IP than the fifth electron which has to be released from 2p 6 , requires very high IP.

Hence, option B is correct.