Published by:
CGP EDU Academic Team
Published on: September 12, 2026
Experimentally it is found that 12. 8 eV energy is required to separate a hydrogen atom into a proton and an electron. So the orbital radius of the electron in a hydrogen atom is 
. The value of the x is:_____. (1 eV - 1.6 x 10 -19 J, 
= 9 x 10 9 
and electronic charge = 1.6 x 10 -19 C)
Text Solution
Verified by ExpertsThe correct answer is:
16
(16)
The given data is
q= 1.6 x 10 -19 C
= 9 x 10 9 N m 2 C -2
The formula for the value of energy in a hydrogen atom is given by
It is given
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