Recently I read about element 137 (feynmanium / Untriseptium ), the element which would theoretically have its electrons moving faster than light (if I understood it the right way). I know that if you involve relativity in the analysis, the problem occurs in element 139, but thats kind of irrelevant to my question. Here is my first question : The article said the speed of electrons in the 1s electron orbital could be obtained with this equation : v = Z *alpha* c = (Z*c)/(137.036) . Why is that so? This leads me to my second question. I did a bit of research myself, and found that the fraction 1/137.036 was the fine structure constant, and thats where I hit a roadblock. What is the fine structure? I know it's the splitting of the spectral lines in atoms, but I'm having trouble understanding this concept. And I need help, please!