Question

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 -

(A) Na 

(B) Si

(C) F 

(D) Ca

Answer 1

Explanation

(B) Si

The jump in IP values exist in IP₅ and thus removal of fifth electron occurs from inner shell. Thus element contains four electrons in its valency shell.