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A radioactive transuranic metallic element
Answer for the clue "A radioactive transuranic metallic element ", 9 letters:
neptunium
Alternative clues for the word neptunium
Word definitions for neptunium in dictionaries
WordNet
Word definitions in WordNet
n. a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium [syn: Np , atomic number 93 ]
Wikipedia
Word definitions in Wikipedia
Neptunium is a chemical element with symbol Np and atomic number 93. A radioactive actinide metal, neptunium is the first transuranic element . Its position in the periodic table just after uranium , named after the planet Uranus , led to it being named ...
Douglas Harper's Etymology Dictionary
Word definitions in Douglas Harper's Etymology Dictionary
1941, from Neptune + element ending -ium . Named for its relative position in the periodic table, next after Uranium , as the planet Neptune is one beyond Uranus. See also plutonium .
Wiktionary
Word definitions in Wiktionary
n. The transuranic chemical element with atomic number 93 and symbol Np.
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Neptunium \Nep*tu"ni*um\, n. [NL.] A radioactive metallic element of atomic number 93, produced in nuclear reactors from Plutonium or Uranium. Symbol Np; The atomic weight of the most stable isotope is 237.0482.
Usage examples of neptunium.
Nitrogen, Nb for Nobelium, Nd for Neodymium, Ne for Neon, Ni for Nickel, No for Niobrium, Np for Neptunium.
Caius Gracchus, was one sent to this part of Bruttii, under the name of Colonia Minervia Scolacium, a name parallel to those of Colonia Neptunia Tarentum and Colonia Junonia Karthago, decided on at the same time.
And Ireta, a satellite of a suspected third generation sun, ought to be rich in the heavier elements, rich in the transuranics and actinides, neptunium, plutonium and the more esoteric of the rare elements above uranium on the periodic table, so urgently and constantly required by the Federation of Sentient Populations, the search for which was one of the primary tasks of the EEC.
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).