Definition of Promethium. Meaning of Promethium. Synonyms of Promethium

- 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...
- to moderately toxic, but the insoluble ones are not. All isotopes of promethium are radioactive, and it does not occur naturally in the earth's crust...
- have at least one stable isotope (except for technetium, element 43 and promethium, element 61, which have no stable isotopes). Isotopes considered stable...
- meet Sanchez, head of Promethium's Mexico plant. Unbeknownst to Harold, it is revealed that Sanchez has been selling Promethium's latest product, medical...
- and Madame Rouge. During this time, he invents a form of uranium called Promethium which is used by Deathstroke and Vic Stone/Cyborg. In Swamp Thing (vol...
- the lanthanides praseodymium to its left and the radioactive element promethium to its right, and above the actinide uranium. Its 60 electrons are arranged...
- these radioisotopes. A consequence of this rule is that technetium and promethium both have no stable isotopes, as each of the neighboring elements on the...