Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Francium> ?p ?o }
- Francium abstract "Francium is a chemical element with symbol Fr and atomic number 87. It used to be known as eka-caesium and actinium K. It is the second-least electronegative element, behind only caesium. Francium is a highly radioactive metal that decays into astatine, radium, and radon. As an alkali metal, it has one valence electron.Bulk francium has never been viewed. Because of the general appearance of the other elements in its periodic table column, it is assumed that francium would appear as a highly reflective metal, if enough could be collected together to be viewed as a bulk solid or liquid. Obtaining such a sample is highly improbable, since the extreme heat of decay (the half-life of its longest-lived isotope is only 22 minutes) would immediately vaporize any viewable quantity of the element.Francium was discovered by Marguerite Perey in France (from which the element takes its name) in 1939. It was the last element first discovered in nature, rather than by synthesis. Outside the laboratory, francium is extremely rare, with trace amounts found in uranium and thorium ores, where the isotope francium-223 continually forms and decays. As little as 20–30 g (one ounce) exists at any given time throughout the Earth's crust; the other isotopes (except for francium-221) are entirely synthetic. The largest amount produced in the laboratory was a cluster of more than 300,000 atoms.".
- Francium wikiPageExternalLink frconten.htm.
- Francium wikiPageExternalLink 087.htm.
- Francium wikiPageExternalLink index.html.
- Francium wikiPageID "10821".
- Francium wikiPageLength "27312".
- Francium wikiPageOutDegree "126".
- Francium wikiPageRevisionID "706659350".
- Francium wikiPageWikiLink Actinium.
- Francium wikiPageWikiLink Alkali_metal.
- Francium wikiPageWikiLink Alpha_decay.
- Francium wikiPageWikiLink Astatine.
- Francium wikiPageWikiLink Atom.
- Francium wikiPageWikiLink Atomic_mass.
- Francium wikiPageWikiLink Atomic_number.
- Francium wikiPageWikiLink Auburn_University.
- Francium wikiPageWikiLink Beta_decay.
- Francium wikiPageWikiLink Bismuth.
- Francium wikiPageWikiLink C._M._Nelson.
- Francium wikiPageWikiLink CERN.
- Francium wikiPageWikiLink Caesium.
- Francium wikiPageWikiLink Caesium_perchlorate.
- Francium wikiPageWikiLink Cancer.
- Francium wikiPageWikiLink Category:Francium.
- Francium wikiPageWikiLink Chemical_element.
- Francium wikiPageWikiLink Chemistry.
- Francium wikiPageWikiLink Chloroplatinate.
- Francium wikiPageWikiLink Congener_(chemistry).
- Francium wikiPageWikiLink Coprecipitation.
- Francium wikiPageWikiLink Coupling_constant.
- Francium wikiPageWikiLink Covalent_bond.
- Francium wikiPageWikiLink Crust_(geology).
- Francium wikiPageWikiLink Curie_Institute_(Paris).
- Francium wikiPageWikiLink D._K._Dobroserdov.
- Francium wikiPageWikiLink Decay_energy.
- Francium wikiPageWikiLink Deuterium.
- Francium wikiPageWikiLink Dubnium.
- Francium wikiPageWikiLink Electron_affinity.
- Francium wikiPageWikiLink Electronegativity.
- Francium wikiPageWikiLink Energy_level.
- Francium wikiPageWikiLink Equivalent_weight.
- Francium wikiPageWikiLink F._H._Hirsh_Jr..
- Francium wikiPageWikiLink File:Franciumtrap.PNG.
- Francium wikiPageWikiLink File:Marguerite_Perey.jpg.
- Francium wikiPageWikiLink Fred_Allison.
- Francium wikiPageWikiLink Frederick_H._Loring.
- Francium wikiPageWikiLink Gallium.
- Francium wikiPageWikiLink Gerald_J._F._Druce.
- Francium wikiPageWikiLink Ground_state.
- Francium wikiPageWikiLink Half-life.
- Francium wikiPageWikiLink Helium.
- Francium wikiPageWikiLink Horia_Hulubei.
- Francium wikiPageWikiLink International_Union_of_Pure_and_Applied_Chemistry.
- Francium wikiPageWikiLink Iodate.
- Francium wikiPageWikiLink Ion.
- Francium wikiPageWikiLink Ionization_energy.
- Francium wikiPageWikiLink Irène_Joliot-Curie.
- Francium wikiPageWikiLink Isotope.
- Francium wikiPageWikiLink Isotopes_of_actinium.
- Francium wikiPageWikiLink Jean_Baptiste_Perrin.
- Francium wikiPageWikiLink L._E._Glendenin.
- Francium wikiPageWikiLink Lead.
- Francium wikiPageWikiLink Lepidolite.
- Francium wikiPageWikiLink Linus_Pauling.
- Francium wikiPageWikiLink Magneto-optic_effect.
- Francium wikiPageWikiLink Manganese(II)_sulfate.
- Francium wikiPageWikiLink Marguerite_Perey.
- Francium wikiPageWikiLink Mendeleevs_predicted_elements.
- Francium wikiPageWikiLink Mercury_(element).
- Francium wikiPageWikiLink Metastability.
- Francium wikiPageWikiLink Mineral.
- Francium wikiPageWikiLink Moldavia.
- Francium wikiPageWikiLink Neptunium.
- Francium wikiPageWikiLink Newton_(unit).
- Francium wikiPageWikiLink Nobel_Prize.
- Francium wikiPageWikiLink Nuclear_isomer.
- Francium wikiPageWikiLink Odessa.
- Francium wikiPageWikiLink Paris.
- Francium wikiPageWikiLink Perchloric_acid.
- Francium wikiPageWikiLink Picrate.
- Francium wikiPageWikiLink Polarizability.
- Francium wikiPageWikiLink Pollucite.
- Francium wikiPageWikiLink Potassium.
- Francium wikiPageWikiLink Potassium-40.
- Francium wikiPageWikiLink Quantum_mechanics.
- Francium wikiPageWikiLink Radioactive_decay.
- Francium wikiPageWikiLink Radium.
- Francium wikiPageWikiLink Radon.
- Francium wikiPageWikiLink Relativistic_quantum_chemistry.
- Francium wikiPageWikiLink Rhenium.
- Francium wikiPageWikiLink Rubidium.
- Francium wikiPageWikiLink Salt.
- Francium wikiPageWikiLink Silicotungstic_acid.
- Francium wikiPageWikiLink Solubility.
- Francium wikiPageWikiLink Spectroscopy.
- Francium wikiPageWikiLink Stony_Brook_University.
- Francium wikiPageWikiLink Subatomic_particle.
- Francium wikiPageWikiLink Superoxide.
- Francium wikiPageWikiLink Surface_tension.
- Francium wikiPageWikiLink Sylvain_Lieberman.