Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Actinium> ?p ?o. }
Showing items 1 to 51 of
51
with 100 items per page.
- Actinium abstract "Actinium is a radioactive chemical element with symbol Ac (not to be confused with the abbreviation for an acetyl group) and atomic number 89, which was discovered in 1899. It was the first non-primordial radioactive element to be isolated. Polonium, radium and radon were observed before actinium, but they were not isolated until 1902. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table.A soft, silvery-white radioactive metal, actinium reacts rapidly with oxygen and moisture in air forming a white coating of actinium oxide that prevents further oxidation. As with most lanthanides and actinides, actinium assumes oxidation state +3 in nearly all its chemical compounds. Actinium is found only in traces in uranium ores as the isotope 227Ac, which decays with a half-life of 21.772 years, predominantly emitting beta particles. One tonne of uranium ore contains about 0.2 milligrams of actinium. The close similarity of physical and chemical properties of actinium and lanthanum makes separation of actinium from the ore impractical. Instead, the element is prepared, in milligram amounts, by the neutron irradiation of 226Ra in a nuclear reactor. Owing to its scarcity, high price and radioactivity, actinium has no significant industrial use. Its current applications include a neutron source and an agent for radiation therapy targeting cancer cells in the body.".
- Actinium wikiPageExternalLink books?id=bnS5elHL2w8C&pg=PA87.
- Actinium wikiPageExternalLink actinium.pdf.
- Actinium wikiPageExternalLink r?dbs+hsdb:@term+@na+@rel+actinium,+radioactive.
- Actinium wikiPageExternalLink 089.htm.
- Actinium wikiPageID "899".
- Actinium wikiPageRevisionID "603480307".
- Actinium book "Actinides".
- Actinium book "Actinium".
- Actinium book "Chemical elements".
- Actinium book "Group 3 elements".
- Actinium book "Period 7 elements".
- Actinium commons "y".
- Actinium hasPhotoCollection Actinium.
- Actinium portal "Chemistry".
- Actinium wikt "y".
- Actinium wiktSearch "actinium".
- Actinium subject Category:Actinides.
- Actinium subject Category:Actinium.
- Actinium subject Category:Chemical_elements.
- Actinium comment "Actinium is a radioactive chemical element with symbol Ac (not to be confused with the abbreviation for an acetyl group) and atomic number 89, which was discovered in 1899. It was the first non-primordial radioactive element to be isolated. Polonium, radium and radon were observed before actinium, but they were not isolated until 1902.".
- Actinium label "Actinio".
- Actinium label "Actinium".
- Actinium label "Actinium".
- Actinium label "Actinium".
- Actinium label "Actinium".
- Actinium label "Actínio".
- Actinium label "Aktyn".
- Actinium label "Attinio".
- Actinium label "Актиний".
- Actinium label "أكتينيوم".
- Actinium label "アクチニウム".
- Actinium label "锕".
- Actinium sameAs Aktinium.
- Actinium sameAs Actinium.
- Actinium sameAs Ακτίνιο_(στοιχείο).
- Actinium sameAs Actinio.
- Actinium sameAs Aktinio.
- Actinium sameAs Actinium.
- Actinium sameAs Aktinium.
- Actinium sameAs Attinio.
- Actinium sameAs アクチニウム.
- Actinium sameAs 악티늄.
- Actinium sameAs Actinium.
- Actinium sameAs Aktyn.
- Actinium sameAs Actínio.
- Actinium sameAs m.027sjs4.
- Actinium sameAs Q1121.
- Actinium sameAs Q1121.
- Actinium wasDerivedFrom Actinium?oldid=603480307.
- Actinium isPrimaryTopicOf Actinium.