A) 0.53 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]
B) 1.06 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]
C) 2.12 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]
D) 0.265 \[\overset{\text{o}}{\mathop{\text{A}}}\,\]
Correct Answer: B
Solution :
\[r=\frac{{{n}^{2}}}{Z}({{r}_{0}})\]; Þ \[\Rightarrow {{r}_{(n=2)}}=\frac{{{(2)}^{2}}}{2}\times 0.53=1.06\,\overset{\text{ }\!\!{}^\circ\!\!\text{ }}{\mathop{\text{A}}}\,\]
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