Coccydynia is often caused by an injury, but it may occur seemingly spontaneously. There are many causes of tailbone pain that can mimic coccydynia, including sciatica, infection (including shingles of the buttocks), pilonidal cysts, sacroiliitis, and fractured bone (broken tailbone or tailbone fracture).
Characteristics: Curium is a hard, dense radioactive silvery-white metal. It tarnishes slowly in dry air at room temperature. Most compounds of trivalent curium are slightly yellow in color. Curium is highly radioactive and it glows red in the dark.
Copper is one of the most important metals. Copper is reddish with a bright metallic lustre. It is malleable, ductile, and a good conductor of heat and electricity (second only to silver in electrical conductivity).Its alloys, brass and bronze, are very important.Monel and gun metals also contain copper.opper metal is not particularly reactive and indeed is found as the free metal (native) on occasion. Copper sulfate is [Cu(SO 4)(OH 2) 4 ].H 2 O in the crystalline state; it is particularly well known and was often called blue vitriol.