Abstract

Stern-Gerlach experiments revisited for H and H₂. Magnetically deflected hydrogen rays indicate ortho- and paramagnetic varieties. Of H and H₂, there is no extranuclear electron in the hydrogen atom. Pauli's exclusion principle and the H-atom: according to Pauli even any valence electron has zero angular momentum. From a physical point of view a zero angular momentum is a zero angular velocity of the electron. It must crash into the nucleus and destroy the wonderful arranged electron shells. Pauli made the assertion that the orbital angular momentum in the ground state is zero in order to save the phenomena, namely the 2-beam outcome of the Stern-Gerlach experiment. The Phipps-Taylor experiment shows for hydrogen also a branching of 2 beams but there is a central undeviated beam, too. This experimental result contradicts the exclusion rules of Pauli.