Thorium exist in many minerals; examples: thorianite, thorite, monazite.

Th(NO3)4 + 2 H2C2O4-----------Th(C2O4)2 + 4 HNO3 Thorium oxalate is a white powder, toxic, used in the analytical chemistry of thorium and in the technology of thorium separation from other elements.

Thorium-234 has a half-life of 24.1 days. How much of a 100-g sample of thorium-234 will be unchanged after 48.2 days?

25 grams of Thorium-234

Common compounds of thorium: thorium dioxide, thorium trifluoride, thorium tetrafluoride, thorium tetrachloride, thorium triiodide, thorium diiodide,

thorium tetraiodide, thorium nitrate, thorium oxalate, thorium carbide, thorium sulfides, thorium nitride, thorium oxinate, etc.