Wikipedia data page on electron affinities shows second and third electron affinities. Of course, they are negative, because one tries to attach electron to anion. But how are they measured or calculated in practice?

Electron affinity in Wikipedia

  • $\begingroup$ You have an electron rich source and measure the ratios of different charge states. $\endgroup$ – Jon Custer Nov 29 '18 at 23:11
  • $\begingroup$ @JonCuster Thank you. But i still not clearly undestand it in detail. Could you point to some publications or relevant keywords for search? $\endgroup$ – Alexander Olikevich Nov 30 '18 at 5:24
  • $\begingroup$ There are spectroscopic methods, which calculates number of atoms ejected of a salt MX (X has -2 oxidation state) is calculated and equilibrium constant between X2- —>X+2e is calculated and then electron affinity. Here is the pdf google.co.in/url?sa=t&source=web&rct=j&url=http://… $\endgroup$ – Saurabh Singh Nov 30 '18 at 17:13
  • $\begingroup$ @SauravSingh Thank you! Could you write this as answer? $\endgroup$ – Alexander Olikevich Dec 3 '18 at 18:51

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