Question

In Bohr's theory, relation between principal quantum number n and radius of orbit $r$ is :

• A. $r\propto \frac{1}{n^2}$
• B. $r\propto n$
• C. $r\propto \frac{1}{n}$
• D. $r\propto n^2$

Answer 1

Answer: (D)

$r\propto n^2$

• Bohr's theory satisfactorily explains the spectrum of species having one electron ie., hydrogen atom, ${He}^{+}$, ${Li}^{2+}$
  
• The experimental value of radii and energies in hydrogen atom are in good agreement with that calculated on Bohr's theory.
• Bohr's concept of stationary orbit of electron explains the emission and absorption spectra of hydrogen like atoms.