Question

The radius of potassium atom is $0.203$ nm. The radius of the potassium ion in nano-meter will be:

• A. $0.133$
• B. $0.231$
• C. $0.234$
• D. $0.251$

Answer 1

The correct option is A $0.133$

Radius of $\left(K\right)=0.203$ nm

Since radius $=K>K^{+}$

Due to more $Z_{eff}$ on $K^{+},$ it's radius decreases than neutral potassium$.$

So$,$ radius of $\left(K^{+}\right)=0.133$ nm$.$