Question

Two p-block elements $x$ having (outer shell configuration ns${}^2$,np${}^3$ and $z$ (outer shell configuration ns${}^2$,np${}^4$) occupy neighbouring positions in a period. Using this information which of the following is correct with respect to their ionization potential as $I_x$ and $I_z$

• A. $I_x>I_z$
• B. $I_z>I_x$
• C. $I_z=I_x$
• D. $\text{Relation between}{I}_x\text{and}{I}_z\text{is uncertain}$

Answer 1

The correct option is A $I_x>I_z$

Option a is correct because in case of $x$ there is half $p$ orbital and as we know that half filled or full filled subshell have extra stability due to having stable electronic configuration so this is the reason that we need more enery to pull out an electron so $x$ have more ionisation potential than $z$ or $I_x>I_z$.