Promethiom
Elven gemyk ew promethiom, niver 61 e'n Vosen Beriodek. Y arwodh ew Pm. An hanow a dheu dhort an Titan en mythologieth grek, Prometheus, neb a ladras tan dhort an Duwow ha'y rei dhe dus. Onan a'n elvednow dor-tanow, po lanthanid ew promethiom.
 | |
 | |
| Ensampel a |
Elven gymyk, elven synthesek  |
|---|---|
| Furvell gymyk |
Pm |
| Dydhyas diskudhans |
1945 |
| Niver atomek |
61 |
| Elektronegedhegedh |
1.13 |
| Studh oksidyans |
2, 3 |
| Rann a |
lanthanid, period 6 |
 Restrennow kelmys war Gemmyn Wikimedia | |
Nag eus radn dhe promethiom e'n korf denel, en gwir, pur beryllus ew awos y radyoweythresans glew.
Diskudhys veu promethiom en 1938 gen bagas a skiensydhyon en Universita Stat Ohio, Jacob Marinsky, Larry Glendenin ha Charles Coryell. Gwrek Coryell a brovyas an hanow promethiom.
Kevys ew promethiom en askorrasow folsans en dasoberoryon nuklerek. Pub isotop ew radywoweythresek, ha'n hanter-bewnans hirra gen promethiom-145 - 17.7 bledhen. Usys ew promethiom-147 avel dyller dewydnyans β en paynt golow (ema golow glas ganjo), en batriow atomek usys en rewloryon kolon ha towlydnow gidys.
Poos atomek promethiom ew 145, y boynt teudhi ew 1042°C ha'y boynt bryjyon ew 3000°C. Y dhosedh ew 7.2kg an liter.
Mirva
golegi-
Moon uraniom, pygvoon (askorrys ew promethiom dhort uraniom) -
Charles Coryell -
Jacob Marinsky -
Larry Glendenin -
Lymnans a Prometheus gen Heinrich Fueger -
Paynt golow -
Towlyn gidys
Ma an erthygel ma usya an Furv Skrifys Savonek a-barth Kernowek diwedhes.