I am calculating some energylevels on the jellium model. But what is the jellium model (sorry to say, but google has failed me). I understand that it's some kind of electron gas/electron sea model of atomclusters. Like for example sodium. Maybe it's correlated to magic numbers. If someone could explain what magic numbers is (or at least how you find out if like 40 sodium atoms together is a magic number-constellation). (I have used the searchfunction and the newest thread with jellium in it was somewhat of a zombie).