Astatin
Elven gemyk ew astatin, niver 85 e'n Vosen Beriodek. Y arwodh ew At. An hanow a dheu dhort an ger Greka astatos, ow styrya diantel.
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| Ensampel a |
Elven gymyk, elven synthesek  |
|---|---|
| Klass |
govetelek, bagas 17 |
| Dydhyas diskudhans |
1940 |
| Niver atomek |
85 |
| Elektronegedhegedh |
2.2 |
| Rann a |
period 6, bagas 17 |
 Restrennow kelmys war Gemmyn Wikimedia | |
Elven gemyk ew astatin, niver 85 e'n Vosen Beriodek. Y arwodh ew At. An hanow a dheu dhort an ger Greka astatos, ow styrya diantel.
Astatin ew an elven naturel moyha tanow war an Norvys. Pur beryllus ew drefen y radyoweythres glew.
Askorrys o astatin rag an kensa pres en 1940 en Universita Kaliforni gen tri skiensydh: Dale Corson, K Mackenzie hag Emilio Segre (fysegydh italek neb a fias dhe'n fo dhort rewlyans Mussolini). Drefen breynans radyoweythresek, ema le ha 30g en kresten an nor. Na ell skiensydhyon askorra myns meur luck rag y weles. An radyowethres glew a wrussa y ethenna a-dhistowgh. Desevys ew ha bos hevelep dhe iodin war radn y liw (tewl/du) ha komposyans (divetelek). Estemys ew bos y boynt teudhi ha poynt bryjyon ogas dhe 302°C ha 337°C. Hanter bewnans an isotop hag a vyw hirra ew 8 our.
Ma an erthygel ma usya an Furv Skrifys Savonek a-barth Kernowek diwedhes.
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