Question

Which of the following has highest ionic radii?

• A. $Fe^{3+}$
• B. $Cr^{3+}$
• C. $Mn^{3+}$
• D. $Co^{3+}$

Answer 1

Answer: (B)

$Cr^{3+}$

Answer 2

Ionic radii $\propto \frac{1}{\text{atomic number}},$ ionic radius decreases from left to right in a period.