A) \[\frac{1}{2}\]
B) 1
C) \[\frac{3}{2}\]
D) 2
Correct Answer: B
Solution :
Value of Z for hydrogen =1 Value of Z for helium = 2 Value of n for both is = 1 \[{{r}_{H}}=\frac{0.52\times {{1}^{2}}}{1}\] \[{{r}_{H{{e}^{+}}}}=\frac{0.52\times {{1}^{2}}}{1}\] \[\frac{{{r}_{H}}}{{{r}_{H{{e}^{+}}}}}=1:1\] or \[{{r}_{H{{e}^{+}}}}:{{r}_{H}}=1:1\]
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