In chemistry, a carbide is a compound composed of carbon and a less electronegative element.
Carbon (from carbo "coal") is a chemical element with symbol C and atomic number 6.
A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) composed of atoms from more than one element held together by chemical bonds.
An inorganic compound is typically a chemical compound that lacks C-H bonds, that is, a compound that is not an organic compound, but the distinction is not defined or even of particular interest.
Thorium is a weakly radioactive metallic chemical element with symbol Th and atomic number 90.