Atoms And Nuclei Question 27
Question: The radius of electron’s second stationary orbit in Bohr’s atom is R. The radius of the third orbit will be [EAMCET 1992; DPMT 1999]
Options:
A) 3 R
B) 2.25 R
C) 9 R
D) $ \frac{R}{3} $
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Answer:
Correct Answer: B
Solution:
$ r\propto n^{2} $
Þ $ \frac{{r_{(n=2)}}}{{r_{(n=3)}}}=\frac{4}{9} $
Þ $ {r_{(n=3)}}=\frac{9}{4}R=2.25,R $
BETA
