It is used as a metal detector.  Californium is the heaviest actinide to exhibit covalent properties, as is observed in the californium borate. The RSC maintains this Site for your information, education, communication, and personal entertainment. Atoms of the same element with different numbers of neutrons.  By 1995, the HFIR nominally produced 500 milligrams (0.018 oz) of californium annually. It has the chemical symbol Cf.  Although californium-251 has the longest half-life, its production yield is only 10% due to its tendency to collect neutrons (high neutron capture) and its tendency to interact with other particles (high neutron cross-section). A measure of how difficult it is to compress a substance. The Chemical Abstracts Service registry number is a unique identifier of a particular chemical, designed to prevent confusion arising from different languages and naming systems. Properties: Californium metal has not been produced. The boiling point of californium is predicted to be around 1470°C and its melting point is expected to be around 900°C. Murray Robertson is the artist behind the images which make up Visual Elements. Ionizing radiation emitted by californium on bone and in the liver can cause cancer. Attempts to reduce or oxidize californium (III) have been unsuccessful. Welcome to "A Visual Interpretation of The Table of Elements", the most striking version of the periodic table on the web. It is a solid metal at room temperature and it has a melting point of 900°c and a boiling point of 1470°c. Metallic californium has been prepared and is structurally similar to metallic americium, curium, berkelium, and most lanthanoid metals. , Californium-249 is formed from the beta decay of berkelium-249, and most other californium isotopes are made by subjecting berkelium to intense neutron radiation in a nuclear reactor. Half of the distance between two atoms within a single covalent bond. Soldiers use metal detectors to hunt for mines or explosives underground. Californium is insoluble in water. Where more than one isotope exists, the value given is the abundance weighted average. Californium (Cf) is a radio metallic chemical element with atomic number 98 and is a member of actinide group of periodic table, discovered by G.T Seaborg in the year 1950. Chemistry in its element is brought to you by the Royal Society of Chemistry and produced by. Californium. The Oak Ridge National Laboratory in Tennessee is the only producer of Cf-252 for the U.S. government. , The element has two crystalline forms at standard atmospheric pressure: a double-hexagonal close-packed form dubbed alpha (α) and a face-centered cubic form designated beta (β). • metal and explosives detection, the latter in airport settings A limited number of californium compounds have been made, and these include californium oxide, californium oxychloride, californium oxysulfate, and californium trichloride. The element was named after the university and the U.S. state of California. Density is the mass of a substance that would fill 1 cm3 at room temperature. The transition of a substance directly from the solid to the gas phase without passing through a liquid phase.  Neutron moisture gauges use californium-252 to find water and petroleum layers in oil wells, as a portable neutron source for gold and silver prospecting for on-the-spot analysis, and to detect ground water movement.  Californium-250 is made by bombarding berkelium-249 (24997Bk) with neutrons, forming berkelium-250 (25097Bk) via neutron capture (n,γ) which, in turn, quickly beta decays (β−) to californium-250 (25098Cf) in the following reaction:, Bombardment of californium-250 with neutrons produces californium-251 and californium-252. The temperature at which the solid–liquid phase change occurs. Californium metal has a very strong neutron emitter. 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