...) is 1s²2s²2p⁴. Entr'acte. Pauli first met Paul Ehrenfest, already a famous physicist, at a conference. After a brief conversation about their respective publications, Ehrenfest remarked to the younger man, “I think I like your …[research] … better than I like you.” Pauli replied, “That's strange. With me...

... personally I am very conscious of the fact that I have been taught how to teach, mainly by example, but also by definite advice. The man who taught me was the late Professor Paul Ehrenfest at the University of Leiden in Holland, who was in my opinion one of the really great teachers. It seemed...