A) \[\frac{4{{a}_{0}}}{3}\]
B) \[\frac{4{{a}_{0}}}{9}\]
C) \[\frac{2{{a}_{0}}}{3}\]
D) \[\frac{2{{a}_{0}}}{9}\]
Correct Answer: A
Solution :
\[r=0.529\frac{{{n}^{2}}}{z}\overset{\text{o}}{\mathop{\text{A}}}\,\] Bohr?s radius for hydrogen atom \[\left( {{a}_{0}} \right)=0.529\,\overset{\text{o}}{\mathop{\text{A}}}\,\] Bohr?s radius of \[L{{i}^{+2}}\]ion for \[n=2\] \[=\,\,{{a}_{0}}\frac{{{n}^{2}}}{z}\] \[=\,\,\frac{4{{a}_{0}}}{3}\]
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