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- Caesium abstract "Caesium or cesium is a chemical element with symbol Cs and atomic number 55. It is a soft, silvery-gold alkali metal with a melting point of 28 °C (82 °F), which makes it one of only five elemental metals that are liquid at or near room temperature. Caesium is an alkali metal and has physical and chemical properties similar to those of rubidium and potassium. The metal is extremely reactive and pyrophoric, reacting with water even at −116 °C (−177 °F). It is the least electronegative element. It has only one stable isotope, caesium-133. Caesium is mined mostly from pollucite, while the radioisotopes, especially caesium-137, a fission product, are extracted from waste produced by nuclear reactors.The German chemist, Robert Bunsen and physicist, Gustav Kirchhoff, discovered caesium in 1860 by the newly developed method of flame spectroscopy. The first small-scale applications for caesium were as a "getter" in vacuum tubes and in photoelectric cells. In 1967, based on Einstein defining the speed of light as the most constant dimension in the universe, the International System of Units isolated two specific wave counts from an emission spectrum of caesium-133 to co-define the second and the meter. Since then, caesium has been widely used in highly accurate atomic clocks.Since the 1990s, the largest application of the element has been as caesium formate for drilling fluids. It has a range of applications in the production of electricity, in electronics, and in chemistry. The radioactive isotope caesium-137 has a half-life of about 30 years and is used in medical applications, industrial gauges, and hydrology. Although the element is only mildly toxic, it is a hazardous material as a metal and its radioisotopes present a high health risk if released into the environment.".
- Caesium thumbnail CsCrystals.JPG?width=300.
- Caesium wikiPageExternalLink 055.htm.
- Caesium wikiPageExternalLink the-modern-alchemist-reacting-fluorine-with-caesium.
- Caesium wikiPageID "5879".
- Caesium wikiPageLength "80222".
- Caesium wikiPageOutDegree "435".
- Caesium wikiPageRevisionID "683577591".
- Caesium wikiPageWikiLink Abundance_of_elements_in_Earths_crust.
- Caesium wikiPageWikiLink Acerinox_accident.
- Caesium wikiPageWikiLink Acetate.
- Caesium wikiPageWikiLink Acid–base_reaction.
- Caesium wikiPageWikiLink Acrylic_acid.
- Caesium wikiPageWikiLink Alkali_metal.
- Caesium wikiPageWikiLink Alkali_metals.
- Caesium wikiPageWikiLink Alkalide.
- Caesium wikiPageWikiLink Alkaline_earth_metal.
- Caesium wikiPageWikiLink Alkene.
- Caesium wikiPageWikiLink Alloy.
- Caesium wikiPageWikiLink Alum.
- Caesium wikiPageWikiLink Aluminium.
- Caesium wikiPageWikiLink Aluminium_oxide.
- Caesium wikiPageWikiLink Aluminium_sulfate.
- Caesium wikiPageWikiLink Amalgam_(chemistry).
- Caesium wikiPageWikiLink American_Chemical_Society.
- Caesium wikiPageWikiLink American_and_British_English_spelling_differences.
- Caesium wikiPageWikiLink Ammonia.
- Caesium wikiPageWikiLink Ammonium_carbonate.
- Caesium wikiPageWikiLink Ampoule.
- Caesium wikiPageWikiLink Anhydrous.
- Caesium wikiPageWikiLink Anion.
- Caesium wikiPageWikiLink Anthraquinone.
- Caesium wikiPageWikiLink Antimony.
- Caesium wikiPageWikiLink Argon.
- Caesium wikiPageWikiLink Arrhenius_base.
- Caesium wikiPageWikiLink Arsenic_toxicity.
- Caesium wikiPageWikiLink Atmosphere_of_Earth.
- Caesium wikiPageWikiLink Atom.
- Caesium wikiPageWikiLink Atomic_clock.
- Caesium wikiPageWikiLink Atomic_emission_spectroscopy.
- Caesium wikiPageWikiLink Atomic_mass.
- Caesium wikiPageWikiLink Atomic_number.
- Caesium wikiPageWikiLink Atomic_weight.
- Caesium wikiPageWikiLink August_Kekulé.
- Caesium wikiPageWikiLink Autoignition_temperature.
- Caesium wikiPageWikiLink Avogadrite.
- Caesium wikiPageWikiLink Azide.
- Caesium wikiPageWikiLink Bad_Dürkheim.
- Caesium wikiPageWikiLink Barium.
- Caesium wikiPageWikiLink Barium-137m.
- Caesium wikiPageWikiLink Barrel_(unit).
- Caesium wikiPageWikiLink Barrel_(volume).
- Caesium wikiPageWikiLink Base_(chemistry).
- Caesium wikiPageWikiLink Becquerel.
- Caesium wikiPageWikiLink Bernic_Lake.
- Caesium wikiPageWikiLink Beryl.
- Caesium wikiPageWikiLink Beta_decay.
- Caesium wikiPageWikiLink Bikita_District.
- Caesium wikiPageWikiLink Biosphere.
- Caesium wikiPageWikiLink Bismuth.
- Caesium wikiPageWikiLink Boiling_point.
- Caesium wikiPageWikiLink Borate_minerals.
- Caesium wikiPageWikiLink Borosilicate_glass.
- Caesium wikiPageWikiLink Cabot_Corporation.
- Caesium wikiPageWikiLink Cadmium.
- Caesium wikiPageWikiLink Cadmium_chloride.
- Caesium wikiPageWikiLink Caesium-133.
- Caesium wikiPageWikiLink Caesium-134.
- Caesium wikiPageWikiLink Caesium-135.
- Caesium wikiPageWikiLink Caesium-137.
- Caesium wikiPageWikiLink Caesium_auride.
- Caesium wikiPageWikiLink Caesium_bromide.
- Caesium wikiPageWikiLink Caesium_chloride.
- Caesium wikiPageWikiLink Caesium_cyanide.
- Caesium wikiPageWikiLink Caesium_fluoride.
- Caesium wikiPageWikiLink Caesium_formate.
- Caesium wikiPageWikiLink Caesium_hydroxide.
- Caesium wikiPageWikiLink Caesium_iodide.
- Caesium wikiPageWikiLink Caesium_nitrate.
- Caesium wikiPageWikiLink Caesium_oxide.
- Caesium wikiPageWikiLink Caesium_standard.
- Caesium wikiPageWikiLink Calcium_carbonate.
- Caesium wikiPageWikiLink Calcium_chloride.
- Caesium wikiPageWikiLink Carbon.
- Caesium wikiPageWikiLink Carbonate.
- Caesium wikiPageWikiLink Carl_Setterberg.
- Caesium wikiPageWikiLink Carnallite.
- Caesium wikiPageWikiLink Category:Alkali_metals.
- Caesium wikiPageWikiLink Category:Articles_containing_video_clips.
- Caesium wikiPageWikiLink Category:Caesium.
- Caesium wikiPageWikiLink Category:Chemical_elements.
- Caesium wikiPageWikiLink Category:Glycine_receptor_agonists.
- Caesium wikiPageWikiLink Category:Reducing_agents.
- Caesium wikiPageWikiLink Cathode.
- Caesium wikiPageWikiLink Cation.
- Caesium wikiPageWikiLink Chalcogen.
- Caesium wikiPageWikiLink Chemical_element.
- Caesium wikiPageWikiLink Chernobyl_disaster.
- Caesium wikiPageWikiLink Chloroplatinic_acid.
- Caesium wikiPageWikiLink Chromate_and_dichromate.