From Wikipedia, the free encyclopedia
Elementi sintetiki ni elementi za kikemia ambazo hazitokei kiasili duniani bali zinaweza kutengenezwa katika maabara. Zinaitwa pia transurania kwa sababu ziko nzito kushinda urani ambayo ni elementi nzito zaidi inayopatikana duniani kiasili.
Hazipo kiasili kwa sababu si imara kutokana na nusumaisha fupi mno; kama zilipatikana kutokana na mmenyuko wa kinyuklia asilia, zilipotea tayari tangu muda mrefu.
Muda wa maisha ya elementi sintetiki ni kati ya sekunde (au sehemu za sekunde tu) hadi miaka kadhaa. Zote ni nururifu yaani zinatoa mnururisho wa kinyuklia.
Elementi zifuatazo hazitokei kiasili duniani. Zote ni transurania zikiwa na namba atomia kuanzia 95 kwenda juu.
Jina la elementi | Alama | Namba atomia | Kuwepo ilithebitishwa mara ya kwanza |
---|---|---|---|
Ameriki | Am | 95 | 1944 |
Kuri | Cm | 96 | 1944 |
Berkeli | Bk | 97 | 1949 |
Californium | Cf | 98 | 1950 |
Einsteini | Es | 99 | 1952 |
Fermi | Fm | 100 | 1952 |
Mendelevi | Md | 101 | 1955 |
Nobeli | No | 102 | 1966 |
Lawrenci | Lr | 103 | 1971 |
Rutherfordi | Rf | 104 | 1966 (USSR), 1969 (U.S.) * |
Dubni | Db | 105 | 1968 (USSR), 1970 (U.S.) * |
Seaborgi | Sg | 106 | 1974 |
Bohri | Bh | 107 | 1981 |
Hassi | Hs | 108 | 1984 |
Meitneri | Mt | 109 | 1982 |
Darmstadti | Ds | 110 | 1994 |
Roentgeni | Rg | 111 | 1994 |
Koperniki | Cn | 112 | 1996 |
Nihoni | Nh | 113 | 2004 |
Flerovi | Fl | 114 | 2004 |
Moskovi | Mc | 115 | 2010 |
Livermori | Lv | 116 | 2004 |
Tennessini | Ts | 117 | 2010 |
Oganessi | Og | 118 | 2006 |
* imethebitishwa mwaka uleule |
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.