What is the difference between the Bohr model and the Lewis Dot structure?
They are two completely different concepts.
Bohr's model is one of the earliest model of atom in history, modified from Rutherford's model.
In 1913, a Danish physicts, Niels Bohr refined Rutherford model of the atom. However, he discovers that electron can only have specific amounts of energy. These energy levels are also known as electron shells.
As for the Lewis Dot Structure, it is the model of an atom that has the chemical symbol for the element surronded by dots to represent the valence electron of the element.
It looks like this: -