Bohr radius for the hydrogen atom (n = 1) is approximately $0.53\,\,\mathop {\rm{A}}\limits^{\rm{o}} .$ The radius for the first excited state ( n = 2) orbit is (in $\mathop {\rm{A}}\limits^{\rm{o}} )$

JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

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Bohr radius for the hydrogen atom (n = 1) is approximately

0.53\,\,\mathop \mathrm{A}\limits^\mathrm{o} .

The radius for the first excited state ( n = 2) orbit is (in

\mathop \mathrm{A}\limits^\mathrm{o} )

View answer and explanation

Correct option: D

2.12

The correct answer is D (2.12) because the radius of an orbit is proportional to n²/Z, where n is the principal quantum number and Z is the atomic number.

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