Promethium is a chemical element; it has symbol Pm and atomic number 61. All of its isotopes are radioactive; it is extremely rare, with only about 500–600...

Promethium (61Pm) is an artificial element, except in trace quantities as a product of spontaneous fission of 238U and 235U and alpha decay of 151Eu, and...

up Promethium or promethium in Wiktionary, the free dictionary. Promethium is a chemical element with symbol Pm and atomic number 61. Promethium may...

promethium dials also dropped by half every 2.62 years, giving them a short useful life, which led to promethium's replacement by tritium. Promethium-based...

Promethium nitride is a binary inorganic compound of promethium and nitrogen with the chemical formula PmN. PmN crystals are of cubic system with Fm3m...

half of the 20th century, radium was progressively replaced with promethium-147. Promethium is only a relatively low-energy beta-emitter, which, unlike alpha...

Dayton during this time invents an exaggerated form of uranium called Promethium to which is later used by Deathstroke the Terminator and Vic Stone/Cyborg...

Promethium(III) oxide is a compound with the formula Pm2O3. It is the most common form of promethium. Promethium oxide exists in three major crystalline...

meet Sanchez, head of Promethium's Mexico plant. Unbeknownst to Harold, it is revealed that Sanchez has been selling Promethium's latest product, medical...

have at least one stable isotope (except for technetium, element 43 and promethium, element 61, which have no stable isotopes). Isotopes considered stable...