Which oxidation states were used when Pauling developed his electronegativity scale?

Paulings electronegativity is a relative scale, based on the difference in electronegativity between X and Y, $$\Delta EN = 0.102 \sqrt {\Delta}$$, where $$\Delta = (X-Y)_{measured}-(X-Y)_{theoretical}$$ bond energies.

But what is the oxidation state of X and Y? Is it an average of the common oxidation states for each element, or is it simply the most common oxidation state? Or do I have it all wrong to begin with?

• Wikipedia Electronegativity article has a section dedicated to this issue. A single valued EN, whatever defined, it is a simplification nevertheless good in many instances. It is expected that one comes here when something isn't clear or covered by very easy to find and more or less reputed sources. – Alchimista May 20 at 12:55
• As far as I can tell, the wikipedia article only mentions that EN changes with oxidation state, and that Allred Rochow calculated some EN-values based on averages of some transition metals. I can't find anything about what oxidation state Linus Pauling himself used for his EN-values.. – Quantonium May 20 at 13:10
• Basically a value for each oxidation states he deal with. But the article should satisfy your question nevertheless. There is no a periodic table electronegativity in reality. Yet, that or other derived values proved useful. – Alchimista May 20 at 13:15