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Radioactive element
Answer for the clue "Radioactive element ", 6 letters:
cerium
Alternative clues for the word cerium
Word definitions for cerium in dictionaries
WordNet
Word definitions in WordNet
n. a ductile gray metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group [syn: Ce , atomic number 58 ]
Wikipedia
Word definitions in Wikipedia
Cerium is a soft , ductile , silvery-white metallic chemical element with symbol Ce and atomic number 58. It tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. It is the second element in the lanthanide series, and while it ...
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Cerium \Ce"ri*um\, n. [Named by Berzelius in 1803 from the asteroid Ceres, then just discovered (1801).] (Chem.) A rare metallic element, occurring in the minerals cerite, allanite, monazite, etc. Symbol Ce. Atomic weight 141.5. It resembles iron in color ...
Usage examples of cerium.
There is more cerium on Earth than copper, more neodymium and lanthanum than cobalt or nitrogen.
Traces of cerium compounds boiled with dioxide of lead and nitric acid will give a yellow solution.
An account of the discovery of cerium may be of some interest to the general reader, not so much for what it tells us about chemistry as for the window it opens into that particular moment in history.
He was the first to produce cerium by decomposing its oxide using potassium vapor.
Then there's cerium one fortyfour, plutonium two thirtynine, barium oneforty.
An early mixture of magnesium and perchlorate of potash has since given way to an even slower-burning mix of aluminum powder and potassium permanganate which will probably remain standard until the last Musky has been slain (long-range plans for long-range artillery shot will have to wait until we can find a good cheap source of cerium, zirconium or thorium—.
An early mixture of magnesium and perchlorate of potash has since given way to an even slower-burning mix of aluminum powder and potassium permanganate which will probably remain standard until the last Musky has been slain (long-range plans for long-range artillery shot will have to wait until we can find a good cheap source of cerium, zirconium or thoriumunlikely in the near future).
He had added small quantities of cerium and praeseodymium to the culture medium to stimulate cell growth, and used them to "dope" the semiconductors to allow the neurons to be electronically interfaced with the diamond substrates of the chips.
That same morning, as all the experts and high officials of the secret police shook their heads, bleary-eyed after a sleepless night, the constructors asked for quartz, vanadium, steel, copper, platinum, rhinestones, dysprosium, yttrium and thulium, also cerium and germanium, and most of the other elements that make up the Universe, plus a variety of machines and qualified technicians, not to mention a wide as sortment of spies--for so insolent had the constructors become, that on the triplicate requisition form they boldly wrote: "Also, kindly send agents of various cuts and stripes at the discretion and with the approval of the Proper Authorities.
If he impregnated a cylindrical fabric with thorium nitrate, to which was added a small percentage of cerium nitrate, he got a brilliant white glow.