that element 72 when discovered would not be a rare earth, as chemists expected and as elements 57 t

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• The Making of the Atomic Bomb whole source · open book

  ming the miracle, Bohr predicted in the autumn of 1922 that element 72 when discovered would not be a rare earth, as chemists expected and as elements 57 through 71 are, but would rather be a valence

  chapter: Chapter 5: Men from Mars

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