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Element 43

Nature volume 143, pages 460461 (18 March 1939) | Download Citation



EVERY time that physics has offered a new analytical tool to chemistry, the most striking success has been the discovery of new elements. Rubidium and csesium are thus offsprings of the use of the spectroscope, polonium and radium were discovered through the new methods of radioactivity, hafnium and rhenium were recognized through their X-ray spectra.

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  1. 1.

    See, however, , and , Sitzb. Preuss. Akad. der Wissenschaften, 19, 400 (1925).

  2. 2.

    , and , J. Chem. Phys., 5, 712 (1937); and in the Press.

  3. 3.

    , and , Phys. Rev., 52, 1252 (1937); and unpublished results.

  4. 4.

    , , Phys. Rev., 54, 772 (1938).

  5. 5.

    , unpublished results

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