For an element the successive ionisation energy value (in `eV " atom"^(-1)` ) are given below `12.32, 26.84, 44.56, 65.63, 203.9, 251.12, 308.4` The element that satisfies the above values is :

Options

A. Si
B. Ca
C. Al
D. S

Answer

A

Explanation

Sudden jump is observed between `IE_(4)` and `IE_(5)`
thus valence electrons `= 4`
configuration of valence shell `= ns^(2)np^(2)`
Thus element belongs to p-block with 4 valence electrons