Terbium

Terbium is a synthetic element that is derivied from other elements/coumponds it ccan oxidize easily and is used in flourcent lamps and tvs. it is aarth element. Terbium is named after a town in scotland? i think. It was discoverd by Carl gustaff mossander in 1843 it its melting and boiling are as follows. Melting point 1356 C boiling point3230 C  its a fuel stabilizer was found in ytterby with other rare earth minerals density is 8.23 so it sinks in pure water a 180 year half life can be diluted in sulfuric acid its the green light in your tv it has a 1.2mg/km you can cut it with a knife used in sonar element number 65 its TR