出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2009/12/17 03:55 UTC 版)
Uranous is the chemical term for the reduced tetrapositive cation of uranium that exhibits the valence U4+. It is one of the two common ionic states of uranium found in nature, the other being the oxidised hexapositive ion called uranyl. Uranous compounds are usually unstable; they revert to the oxidised form on exposure to air.