If the radius of first orbit of \( \mathrm{H} \)-atom is \( x \AA \...

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If the radius of first orbit of \( \mathrm{H} \)-atom is \( x \AA \), then
P the radius of the second orbit of \( \mathrm{Li}^{2+} \) ion will be
(A) \( x \AA \)
(B) \( \frac{4 \mathrm{x}}{3} \AA \)
(C) \( \frac{9 x}{2} \AA \)
(D) \( 4 x \AA \)
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