Question

Describe Bohr's atomic model and compare it to Thomson's atomic model. Then using Bohr's model answer: At what wavelength will emission from n=4 to n=1 for the H atom be observed?

Answer 1

According to Bohr's atomic model, the electrons revolve around the central positively charged nucleus in different energy levels or orbits. When an atom gains or loses energy, the electrons would jump to higher or lower orbits thus absorbing or releasing a photon.

This is in contrast to the Thompson's plum and pudding model of atoms in which the pudding represents a positively charged filling in which negatively charged electron plum floats. According to the model, the filling of positive charge is roughly the same consistency everywhere in an atom.

The inverse of the wavelength emitted when the electron jumps from n1 to n2 is

Here n1 = 1 and n2 = 4

Therefore

therefore the wavelength is