Which of the following has largest ionic radius?

Question

Which of the following has largest ionic radius? (A)  Cs+  (B)  Li+  (C)  Na+  (D)  K+

Tardigrade Admin · Accepted Answer

Atomic and ionic radii increase from top to bottom in a group due to the inclusion of another shell at every step. Hence, Cs+ ion will be the largest among given IA group ions ( Na+,Li+ and K+ ).

Q. Which of the following has largest ionic radius?

$C s^{+}$

$L i^{+}$

$N a^{+}$

$K^{+}$

Atomic and ionic radii increase from top to bottom in a group due to the inclusion of another shell at every step. Hence, $C s^{+}$ ion will be the largest among given IA group ions ( $N a^{+}, L i^{+}$ and $K^{+}$ ).