zerovalenthttp://www.oed.com/dictionary/zerovalent_adj%3Ftab%3Dmeaning_and_usezerovalent, adj.
Revised 2018

zerovalentadjective

Chemistry.
  1. 1906–
    Of an element: having a full outer valence level (and hence a valency of zero); (of a compound or complex) containing an element in this state. Also: of or relating to the condition of having a valency of zero.
    1. 1906
      It is headed by the rare elements which are not known in chemical combination and are said to have no valence... Zero valent: A, He.
      J. P. Iddings, Rock Minerals i. 6 (table)
    2. 1965
      The analogous reaction..of the naphthalene complex in its zerovalent formulation..cannot be distinguished from the possible consecutive reactions.
      Journal of Chemical Society 847
    3. 1977
      Reactions of the zerovalent complex Ni[HP(C6H5)2]4.
      Inorganic Chemistry vol. 16 1313 (heading)
    4. 1984
      A greater proportion of nickel in the catalytically active zero-valent state.
      Science 22 June 1330/2
    5. 2006
      Zerovalent iron materials have been shown to be effective for removing some regulated metal ions, including chromate.
      Water Environment Research vol. 78 85/1

zerovalent, adj. was revised in June 2018.

zerovalent, adj. was last modified in March 2025.