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Radioactive metal, Th
Answer for the clue "Radioactive metal, Th ", 7 letters:
thorium
Alternative clues for the word thorium
Word definitions for thorium in dictionaries
Wikipedia
Word definitions in Wikipedia
Thorium is a chemical element with symbol Th and atomic number 90. A radioactive actinide metal , thorium is one of only two significantly radioactive elements that still occur naturally in large quantities as a primordial element (the other being uranium ...
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Thorium \Tho"ri*um\, n. [NL. See Thorite .] (Chem.) A metallic element found in certain rare minerals, as thorite, pyrochlore, monazite, etc., and isolated as an infusible gray metallic powder which burns in the air and forms thoria; -- formerly called ...
Wiktionary
Word definitions in Wiktionary
n. A chemical element (''symbol'' Th) with atomic number 90.
Douglas Harper's Etymology Dictionary
Word definitions in Douglas Harper's Etymology Dictionary
rare metallic element, 1832, Modern Latin, named by its discoverer, Swedish chemist Jöns Jakob Berzelius (1779-1848) from thorite (silicate of thorium), the name of a mineral found in Norway from which it was extracted (which Berzelius also had named, as ...
Usage examples of thorium.
In a moment he stood aside and Koa lifted out a perfect ring of thorium.
Some of these were easily converted into fissionable uranium 235, and thorium 232 itself was an enormously valuable breeder material for an atomic pile.
The intermediate elements referred to in this radioactive decay chain are lead (symbol Pb, element 82), polonium (Po, element 84), astatine (At, element 85), francium (Fr, element 87), radium (Ra, element 88), actinium (Ac, element 89), thorium (Th, element 90), protoactinium (Pa, element 91), uranium (U, element 92), neptunium (Np, element 93), and americium (Am, element 95).
They have, it is to be presumed, been setting up nuclear intensifiers in places where the soil is rich in uranium or thorium.
Thus were found the mesothorium now used by physicians and manufactured industrially, radio thorium, ionium, protoactinium, radio-lead, and other substances.
It is a typical organic compound, one of the metal radical type, and contains one atom of thorium.
But when the Mole materialized, the phosphoric acid dissolved off the remaining thin plating of thorium from the screws.
When I was a child, it never dawned on me that someone supposedly being starved and beaten in a thorium mine shouldn't have all those luscious curves.
It was now necessary to jack the rocket around until the tubes pointed away from the cabin, so that radiations, after the thorium was in place, would go harmlessly out across the crater of the Doomsday Bomb and, also, so that the rocket would be in position for a captive test run with the exhaust directed away from the cabin.
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.
And it turns out, quite clearly--I will show you all the necessary data at any time you wish--that uranium and thorium collect in Earths crust and upper mantle in concentrations of up to a thousand times as high as in any other habitable world.
But some isotopes of uranium and thorium have little beta, with some alpha and gamma, so Baxter concluded we had powdered uranium ore.