Question

Which of the following statement is correct?

• A. For potassium, the atomic radius < ionic radius but for bromine atomic radius> ionic radius
• B. For potassium and bromine both, atomic radius > ionic radius
• C. For potassium and bromine both, atomic radius < ionic radius
• D. For potassium, the atomic radius > ionic radius but for bromine atomic radius < ionic radius

Answer 1

The correct option is D For potassium, the atomic radius > ionic radius but for bromine atomic radius < ionic radius

Potassium being a metal, have a tendency to lose an electron. The ion of potassium will be $K^{+}$ will be smaller than the atomic radius.
Similarly, Bromine is a non- metal, it will accept an electron. The ion of Bromine $B{r}^{-}$ will have larger ionic radius than atomic radius.
So, option (d) is the correct answer.