What is californium?

  • (noun): A radioactive transuranic element; discovered by bombarding curium with alpha particles.
    Synonyms: Cf, atomic number 98


Californium is a radioactive metallic chemical element with the symbol Cf and atomic number 98. The element was first made at the University of California, Berkeley in 1950 by bombarding curium with alpha particles (helium-4 ions). It is an actinide element, the sixth transuranium element to be synthesized, and has the second-highest atomic mass of all the elements that have been produced in amounts large enough to see with the unaided eye (after einsteinium). The element was named after California and the University of California. It is the heaviest element to occur naturally on Earth; heavier elements can only be produced by synthesis.

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Some articles on californium:

Transuranium Element - Overview
... discovered in the laboratory, with neptunium, plutonium, americium, curium, berkelium and californium later also discovered in nature. 2008, weapons-grade plutonium cost around $4,000/gram, and californium cost $60,000,000/gram ... Due to production difficulties, none of the elements beyond californium has industrial applications, and of them, only einsteinium has ever been produced in macroscopic ...
Isotope Lists, 97+ - Californium
... Main article Isotopes of californium Isotope Half-life Spin Parity Mode(s) or Abundance 237Cf 2.1 s %SF ~ 10 sys 238Cf 21 ms 0+ %SF ~ 100 sys 239Cf 39 s %α=? 240Cf ...
Californium - Precautions
... Californium that bioaccumulates in skeletal tissue releases radiation that disrupts the body's ability to form red blood cells ... Californium can enter the body from ingesting contaminated food or drinks or by breathing air with suspended particles of the element ... Once in the body, only 0.05% of the californium will reach the bloodstream ...
Bk - Applications
... It is also useful as a source of the isotope californium-249, which is used for studies on the chemistry of californium in preference to the more radioactive californium-252 that is produced ...
Bk - Characteristics - Physical
... the periodic table, it is located to the right of the actinide curium, to the left of the actinide californium and below the lanthanide terbium with which it shares many ... Its density of 14.78 g/cm3 lies between those of curium (13.52 g/cm3) and californium (15.1 g/cm3), as does its melting point of 986 °C, below that of curium (1340 °C) but higher ...