Q. According to Bohr’s theory the radius of electron in an orbit described by principle quantum number $n$ and atomic number $Z$ is proportional to
A) $Z^{2}n^{2}$
B) $\frac{Z^{2}}{n^{2}}$
C) $\frac{Z^{2}}{n}$
D) $\frac{n^{2}}{Z}$
Explanation
(d) $r = \frac{\varepsilon_{0}n^{2}h^{2}}{\pi Zme^{2}};\ \therefore r \propto \frac{n^{2}}{Z}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.