Atoms And Nuclei Question 12

Question: In a beryllium atom, if a0 be the radius of the first orbit, then the radius of the second orbit will be in general [CBSE PMT 1992; Roorkee 1993; BHU 1998]

Options:

A) $ na_{0} $

B) $ a_{0} $

C) $ n^{2}a_{0} $

D) $ \frac{a_{0}}{n^{2}} $

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Answer:

Correct Answer: C

Solution:

$ r\propto n^{2} $
Þ $ r_{n}=n^{2}a_{0} $ $ (\because r_{1}=a_{0}) $



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