Question

State giving reasons which one have higher value:

1. $\text{I}{\text{E}}_{\text{1}}$ of F or Cl
   
2. E A of O or Cl
   
3. ionic radius of ${\text{K}}^{\text{+}}\text{or}\text{Cl}$
   

Answer 1

1. $I{E}_1$ of $F$ is higher due to its small size and high electronegativity.

2.$EA$ of $Cl$ is higher as it requires only $1e^{-}$ to complete its octet whereas $O$ requires $2e^{-}$.

3. Ionic radius of $Cl$ is bigger than $K^{+}$ as in $K^{+}$, number of $e^{-}<$ number of $p^{+}$, thereby increasing the effecive nuclear charge. Hence, $K^{+}$ is smaller in size.