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1. WordNet® 3.0 (2006) |
actinium
n 1: a radioactive element of the actinide series; found in
uranium ores [syn: actinium, Ac, atomic number 89]
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2. The Collaborative International Dictionary of English v.0.48 |
Actinium \Ac*tin"i*um\, n. [Gr. ?, ?, ray.] (Chem.)
A supposed metal, said by Phipson to be contained in
commercial zinc; -- so called because certain of its
compounds are darkened by exposure to light.
[1913 Webster]
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3. The Elements (07Nov00) |
actinium
Symbol: Ac
Atomic number: 89
Atomic weight: (227)
Silvery radioactive metallic element, belongs to group 3 of the periodic
table. The most stable isotope, Ac-227, has a half-life of 217 years.
Ac-228 (half-life of 6.13 hours) also occurs in nature. There are 22
other
artificial isotopes, all radioactive and having very short half-lives.
Chemistry similar to lanthanum. Used as a source of alpha particles.
Discovered by A. Debierne in 1899.
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Common Misspellings > |
actinium cactinium catinium acatinium ctinium aactinium atcinium actcinium atinium acctinium acitnium actitnium acinium acttinium actniium actiniium actnium actiinium actiinum actininum actiium actinnium actinuim actiniuim actinum actiniium actinimu actiniumu actinim actiniuum actinimum actiniu actiniumm qctinium aqctinium qactinium wctinium awctinium wactinium sctinium asctinium sactinium xctinium axctinium xactinium zctinium azctinium zactinium ctinium a ctinium actinium ectinium ictinium octinium uctinium astinium acstinium asctinium adtinium acdtinium adctinium aftinium acftinium afctinium axtinium acxtinium axctinium avtinium acvtinium avctinium a tinium ac tinium a ctinium ac5inium act5inium ac5tinium ac%inium act%inium ac%tinium ac6inium act6inium ac6tinium acrinium actrinium acrtinium acyinium actyinium acytinium acfinium actfinium acftinium acginium actginium acgtinium achinium acthinium achtinium act8nium acti8nium act8inium act*nium acti*nium act*inium act9nium acti9nium act9inium actunium actiunium actuinium actonium actionium actoinium actjnium actijnium actjinium actknium actiknium actkinium actlnium actilnium actlinium actanium actenium actigium actingium actignium actihium actinhium actihnium actijium actinjium actijnium actibium actinbium actibnium actimium actinmium actimnium acti ium actin ium acti nium actin8um actini8um actin8ium actin*um actini*um actin*ium actin9um actini9um actin9ium actinuum actiniuum actinuium actinoum actinioum actinoium actinjum actinijum actinjium actinkum actinikum actinkium actinlum actinilum actinlium actinaum actineum actini7m actiniu7m actini7um actini&m actiniu&m actini&um actini8m actiniu8m actini8um actiniym actiniuym actiniyum actiniim actiniuim actiniium actinihm actiniuhm actinihum actinijm actiniujm actinijum actinikm actiniukm actinikum actiniam actiniem actiniom actiniuj actiniumj actiniujm actiniuk actiniumk actiniukm actiniul actiniuml actiniulm actiniun actiniumn actiniunm actiniu actinium actiniu m Definition commonly spelled as: Defanition or Defenition, Synonym as: Synonim, Sinonym or Sinonim, Thesaurus as: Thesorus or Thesauris, Dictionary as: Dictionery or Dictionry and Define is usually not misspelled. What does mispell meen? It Meens...
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