The radius of the first orbit of hydrogen in 0.528˙A. The radius of second

Question

The radius of the first orbit of hydrogen in

0.528 ˙ A

. The radius of second orbit of hydrogen is

Options:

A . 4.752˙A

B . 2.112˙A

C . 0.071˙A

D . 0.142˙A

Answer: Option B
:
B

r_{n} \propto n^{2}

\frac{r_{2}}{r_{1}} = \frac{2^{2}}{1^{2}} = 4

r_{2} = 4 r

= 4 \times 0.528

= 2.112 ˙ A

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