Discovery: period 5sp

This gives the date, where known, of the discovery of the element, together with the discoveror and place of discovery.

image showing Discovery: period 5sp periodic periodicity for 5s and 5p chemical elements


years (AD)


Ref. 2 is a comprehensive volume on the discovery of the elements.

Literature sources

  1. D.R. Lide, (ed.) in Chemical Rubber Company handbook of chemistry and physics, CRC Press, Boca Raton, Florida, USA, 77th edition, 1996.
  2. M.E. Weeks and H.M. Leicester in Discovery of the elements, J. Chem. Ed, Easton, Penn, USA, 1968.

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