Published by:
CGP EDU Academic Team
Published on: September 12, 2026
Considering the Bohr model of hydrogen like atoms, the ratio of the radius of 
orbit of the electron in 
and 
is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
In the Bohr model for a hydrogen-like atom, the radius of the 
orbit is given by
where: 
is the principal quantum number, 
is the Bohr radius, and
is the atomic number (the effective nuclear charge).
For the 
orbit 
:
For 
(where 
):
For 
(where 
):
Now, the ratio of the radius of the 5th orbit of 
to that of 
is:
Thus, the ratio is 
.
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