Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Actinium> ?p ?o }
- 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 many actinides, actinium assumes oxidation state +3 in nearly all its chemical compounds. Actinium is found only in traces in uranium and thorium ores as the isotope 227Ac, which decays with a half-life of 21.772 years, predominantly emitting beta and sometimes alpha particles, and 228Ac, which is beta active with a half-life of 6.15 hours. One tonne of natural uranium in ore contains about 0.2 milligrams of actinium-227, and one tonne of natural thorium contains about 5 nanograms of actinium-228. 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 actinium.pdf.
- Actinium wikiPageExternalLink r?dbs+hsdb:@term+@na+@rel+actinium,+radioactive.
- Actinium wikiPageExternalLink 089.htm.
- Actinium wikiPageExternalLink books?id=bnS5elHL2w8C&pg=PA87.
- Actinium wikiPageID "899".
- Actinium wikiPageLength "35664".
- Actinium wikiPageOutDegree "156".
- Actinium wikiPageRevisionID "708015053".
- Actinium wikiPageWikiLink Acetaldehyde.
- Actinium wikiPageWikiLink Acetate.
- Actinium wikiPageWikiLink Acetyl.
- Actinium wikiPageWikiLink Actinide.
- Actinium wikiPageWikiLink Actinium(III)_oxide.
- Actinium wikiPageWikiLink Alkali_metal.
- Actinium wikiPageWikiLink Alpha_decay.
- Actinium wikiPageWikiLink Alpha_particle.
- Actinium wikiPageWikiLink Alpha_spectrometry.
- Actinium wikiPageWikiLink Aluminium_bromide.
- Actinium wikiPageWikiLink Ammonia.
- Actinium wikiPageWikiLink Ammonium_hydroxide.
- Actinium wikiPageWikiLink Ancient_Greek.
- Actinium wikiPageWikiLink André-Louis_Debierne.
- Actinium wikiPageWikiLink Atomic_mass_unit.
- Actinium wikiPageWikiLink Atomic_number.
- Actinium wikiPageWikiLink Benzene.
- Actinium wikiPageWikiLink Beryllium.
- Actinium wikiPageWikiLink Beta_decay.
- Actinium wikiPageWikiLink Beta_particle.
- Actinium wikiPageWikiLink Bismuth.
- Actinium wikiPageWikiLink Breast_cancer.
- Actinium wikiPageWikiLink Carbon_disulfide.
- Actinium wikiPageWikiLink Carbon_tetrachloride.
- Actinium wikiPageWikiLink Category:Actinides.
- Actinium wikiPageWikiLink Category:Actinium.
- Actinium wikiPageWikiLink Category:Chemical_elements.
- Actinium wikiPageWikiLink Charles_Janet.
- Actinium wikiPageWikiLink Chelation.
- Actinium wikiPageWikiLink Chemical_element.
- Actinium wikiPageWikiLink Citric_acid.
- Actinium wikiPageWikiLink Crystal_structure.
- Actinium wikiPageWikiLink Cubic_crystal_system.
- Actinium wikiPageWikiLink Cyclotron.
- Actinium wikiPageWikiLink DOTA_(chelator).
- Actinium wikiPageWikiLink Decay_chain.
- Actinium wikiPageWikiLink Deuterium.
- Actinium wikiPageWikiLink Dmitri_Mendeleev.
- Actinium wikiPageWikiLink Electron_capture.
- Actinium wikiPageWikiLink Elution.
- Actinium wikiPageWikiLink Ethylenediaminetetraacetic_acid.
- Actinium wikiPageWikiLink Formula_unit.
- Actinium wikiPageWikiLink Friedrich_Oskar_Giesel.
- Actinium wikiPageWikiLink Glenn_T._Seaborg.
- Actinium wikiPageWikiLink Glovebox.
- Actinium wikiPageWikiLink neu.
- Actinium wikiPageWikiLink Half-life.
- Actinium wikiPageWikiLink Hariett_Brooks.
- Actinium wikiPageWikiLink Hexagonal_crystal_system.
- Actinium wikiPageWikiLink Hydrochloric_acid.
- Actinium wikiPageWikiLink Hydrofluoric_acid.
- Actinium wikiPageWikiLink Hydrogen_sulfide.
- Actinium wikiPageWikiLink Institute_for_Transuranium_Elements.
- Actinium wikiPageWikiLink Ion_chromatography.
- Actinium wikiPageWikiLink Isomorphism_(crystallography).
- Actinium wikiPageWikiLink Isotope.
- Actinium wikiPageWikiLink Isotopes_of_lead.
- Actinium wikiPageWikiLink Isotopes_of_thorium.
- Actinium wikiPageWikiLink Lanthanide.
- Actinium wikiPageWikiLink Lanthanum.
- Actinium wikiPageWikiLink Lawrencium.
- Actinium wikiPageWikiLink Leukemia.
- Actinium wikiPageWikiLink Linear_particle_accelerator.
- Actinium wikiPageWikiLink Lithium.
- Actinium wikiPageWikiLink Lymphoma.
- Actinium wikiPageWikiLink Marie_Curie.
- Actinium wikiPageWikiLink Monoclonal_antibody.
- Actinium wikiPageWikiLink Monosodium_phosphate.
- Actinium wikiPageWikiLink Neptunium.
- Actinium wikiPageWikiLink Neuroblastoma.
- Actinium wikiPageWikiLink Neutron_imaging.
- Actinium wikiPageWikiLink Neutron_probe.
- Actinium wikiPageWikiLink Neutron_source.
- Actinium wikiPageWikiLink Nitric_acid.
- Actinium wikiPageWikiLink Noble_gas.
- Actinium wikiPageWikiLink Nuclear_isomer.
- Actinium wikiPageWikiLink Nuclear_reactor.
- Actinium wikiPageWikiLink Otto_Hahn.
- Actinium wikiPageWikiLink Otto_Sackur.
- Actinium wikiPageWikiLink Ovarian_cancer.
- Actinium wikiPageWikiLink Oxalate.
- Actinium wikiPageWikiLink Oxidation_state.
- Actinium wikiPageWikiLink Oxohalide.
- Actinium wikiPageWikiLink PH.
- Actinium wikiPageWikiLink Pearson_symbol.
- Actinium wikiPageWikiLink Pentetic_acid.
- Actinium wikiPageWikiLink Periodic_table.
- Actinium wikiPageWikiLink Pierre_Curie.
- Actinium wikiPageWikiLink Plutonium-239.
- Actinium wikiPageWikiLink Polonium.
- Actinium wikiPageWikiLink Primordial_nuclide.