Neils Bohr

1913 model

His "Galaxy" Theory

Bohr theorized that electrons revolved around the nucleus on invisible rings in certain patterns. This is similar to the way that planets revolve around the sun in our galaxy. The electrons went a 2, 8, ,8, 18, 32 structure.

What Was Wrong With The Model?

In the 1920's, Werner Heisenberg discovered that Bohr's model was incorrect. Electrons didn't orbit the nucleus in well defined circular orbits. Also, the correct structure is 2, 8, 18, then 32.

How to Make the Model