For the carbon atom, it looks like the 1s & 2s orbitals are the same, because, I only see 4 electrons drawn on your diagram, but your printed statement "1s^2,2s^2,2px^1,2py^1" contains six (6) electrons. Why is that? . . . but I still love your lectures! OK, nevermind, I see you didn't depict the 1s orbital. Nice job!