| Revision as of 11:52, 27 September 2020 editR8R (talk | contribs)Extended confirmed users14,384 edits rm undue focus on failed attemptsTags: Reverted 2017 wikitext editor← Previous edit | Revision as of 15:58, 27 September 2020 edit undoAmakuru (talk | contribs)Autopatrolled, Administrators111,967 edits OK stop edit warring on this already. Restoring prior agreed version. Discuss potential changes per WP:BRD, but these are not an improvement. The grammar is poor and doesn't match the article.Tags: Manual revert RevertedNext edit → | ||
| Line 1: | Line 1: | ||
| {{Main page image/TFA|image= |
{{Main page image/TFA|image=Hassium periodic table entry (enwiki).png|caption=] entry }} | ||
| ''']''' is a ] with ] Hs and ] 108. It is highly ]; the most stable known ], <sup>269</sup>Hs, has a ] of approximately 16 seconds. A ], it has only been ] in very small quantities by ] heavy nuclei with lighter ones. Natural occurrences of the element have been hypothesised, but none has ever been found. |
''']''' is a ] with ] Hs and ] 108. It is highly ]; the most stable known ], <sup>269</sup>Hs, has a ] of approximately 16 seconds. A ], it has only been ] in very small quantities by ] heavy nuclei with lighter ones. Natural occurrences of the element have been hypothesised, but none has ever been found. The first attempts to synthesize element 108 were made in 1978 at the ] in the ]; more experiments by them followed in 1983 and 1984. In 1984 the ] in ], ], ], conclusively synthesized the element, and major credit was assigned to the German scientists. The element was named ''hassium'' after the ] of Hesse. In the ], hassium is a member of the ] and ]. Chemical experiments have been scarce but support this assignment. {{TFAFULL|Hassium}} | ||
| {{TFArecentlist| | {{TFArecentlist| | ||
Revision as of 15:58, 27 September 2020
.png)
Periodic table entry
Hassium is a chemical element with symbol Hs and atomic number 108. It is highly radioactive; the most stable known isotope, Hs, has a half-life of approximately 16 seconds. A superheavy element, it has only been produced in a laboratory in very small quantities by fusing heavy nuclei with lighter ones. Natural occurrences of the element have been hypothesised, but none has ever been found. The first attempts to synthesize element 108 were made in 1978 at the Joint Institute for Nuclear Research in the Soviet Union; more experiments by them followed in 1983 and 1984. In 1984 the Gesellschaft für Schwerionenforschung in Darmstadt, Hesse, West Germany, conclusively synthesized the element, and major credit was assigned to the German scientists. The element was named hassium after the German state of Hesse. In the periodic table, hassium is a member of the 7th period and group 8. Chemical experiments have been scarce but support this assignment. (Full article...)
Recently featured: