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Astat (chemická značka At, latinsky Astatinum) je druhým nejtěžším známým prvkem ze 17. skupiny (halogeny), existuje pouze ve formě nestabilních radioaktivních izotopů. Název pochází ze starořeckého ἄστατος „nestálý“.
Historie, Základní fyzikálně-chemické vlastnosti & Sloučeniny
Explore the main themes, entities and connections around Astat. Start with the topic map, then use the sections below for research and deeper semantic analysis.
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astatu ze izotopů chemie značka název 210at chemická at rozpadu radioaktivní kyseliny 1940 bismutu čísla latinsky prvkem halogeny radioaktivních nemá
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Astat | I | I V (%) S T1/2 Z E (MeV) P 209At 5,42 h β+ (95,9 %) 3,486 209Po α(4,1 %) 5,758 205Bi 210At 8,1 h β+ (99,82 %) 3,981 210Po α(0,18 %) 5,632 206Bi 211At 7,214 h β+ (58,2 %) 0,786 2… | 1.00 | infobox |
| Astat | related to Externí odkazy | Galerie | 0.60 | section |
| Astat | related to Externí odkazy | Wikimedia Commons Obrázky | 0.60 | section |
| Astat | related to Externí odkazy | Wikimedia Commons Slovníkové | 0.60 | section |
| Astat | related to Externí odkazy | Wikislovníku | 0.60 | section |
| Astat | related to Historie | Existence | 0.60 | section |
| Astat | related to Historie | Mendělejevem | 0.60 | section |
| Astat | related to Historie | University | 0.60 | section |
| Astat | related to Historie | California | 0.60 | section |
| Astat | related to Historie | Berkeley | 0.60 | section |
| Astat | related to Izotopy | Jejich | 0.60 | section |
| Astat | related to Izotopy | Také | 0.60 | section |
These clusters group vocabulary that occurs around closely connected concepts in the source material.
Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.