# In Bohr’S Model of the Hydrogen Atom, the Radius of the First Orbit of an Electron is R0 . Then, the Radius of the Third Orbit Is: - Physics (Theory)

In Bohr’s model of the hydrogen atom, the radius of the first orbit of an electron is r0 . Then, the radius of the third orbit is:

a) r_0/9

b) r_0

c) 3r_0

d) 9r_0

#### Solution

9r_0

∵ r_n = n^2(r_0)

Is there an error in this question or solution?