Hello! I understand that a lot of this may be considered physics, but It is for AP Chemistry. We will likely be required to identify a certain element on the periodic table given a set of quantum numbers of one of its electrons. I understand the primary quantum number, n, essentially corresponds to the rows on the table. L dictates the type of orbital (s, p, d, etc.). But I am confused on how I can further narrow it down using magnetic quantum number (m) and spin number. For example, I know n=2, l=0 would be either Lithium or Beryllium. What would be the m / spin numbers for each? Essentially, we are being asked to pinpoint a certain element on the table given 4 quantum numbers. I understand how to narrow it down using the primary quantum number and angular quantum number but do not understand how I can further narrow it down using magnetic quantum number and spin number. Sorry if that question is a little discombobulated, hopefully it makes sense. My other concern is the uncertainty principle. How are we meant to do calculations using the uncertainty principle?