| slovo | definícia |
praseodymium
(encz) | praseodymium, |
Praseodymium
(gcide) | Praseodymium \Pra`se*o*dym"i*um\, n. [Praseo- + didymium.]
(Chem.)
An elementary substance, one of the constituents of didymium;
-- so called from the green color of its salts. Symbol Ps.
Atomic weight 143.6.
[1913 Webster] |
praseodymium
(wn) | praseodymium
n 1: a soft yellowish-white trivalent metallic element of the
rare earth group; can be recovered from bastnasite or
monazite by an ion-exchange process [syn: praseodymium,
Pr, atomic number 59] |
praseodymium
(elements) | praseodymium
Symbol: Pr
Atomic number: 59
Atomic weight: 140.907
Soft silvery metallic element, belongs to the lanthanoids. Only natural
isotope is Pr-141 which is not radioactive. Fourteen radioactive
isotopes
have been artificially produced. Used in rare-earth alloys. Discovered
in
1885 by C.A. von Welsbach.
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| | podobné slovo | definícia |
Praseodymium
(gcide) | Praseodymium \Pra`se*o*dym"i*um\, n. [Praseo- + didymium.]
(Chem.)
An elementary substance, one of the constituents of didymium;
-- so called from the green color of its salts. Symbol Ps.
Atomic weight 143.6.
[1913 Webster] |
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