Look up: technetium

1. 
   Technetium
   Technetium is an artificial element with the symbol Tc.
   Found on http://www.encyclo.co.uk/nol.php
   
   
2. 
   technetium
   [n] - a crystalline metallic element not found in nature
   Found on http://www.webdictionary.co.uk/definitio
   
   
3. 
   Technetium
   A radioactive element not found in ores. Symbol Tc
   Found on http://www.diracdelta.co.uk/science/sour
   
   
4. 
   technetium
   chemical element:atomic number 43 Category: Chemistry
   Found on http://www.mijnwoordenboek.nl/definition
   
   
5. 
   technetium
   <radiology> Tc-99m, half-life: 6.03 hr, decay: isomeric transition, radiation: gamma, 140 keV (98%) ... (12 Dec 1998) ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
6. 
   technetium
   Tc noun a crystalline metallic element not found in nature; occurs as one of the fission products of uranium
   Found on http://wordnet.princeton.edu/perl/webwn?
   
   
7. 
   Technetium
   |- | Electron affinity || -53 kJ/mol `Technetium` is the lightest chemical element with no stable isotope. It has atomic number 43 and is given the symbol `Tc`. The chemical properties of this silvery grey, crystalline transition metal are intermediate between rhenium and manganese. Its short-lived gamma-emitting nuclear isomer 99mTc (technetium-99m) is used in nuclear medicine for a wide variety of diagnostic tests. 99Tc is us...
   Found on http://en.wikipedia.org/wiki/Technetium
   
   
8. 
   technetium
   (Tc) (tek-ne´she-әm) a chemical element, atomic number 43, atomic weight 99. technetium 99m the most frequently used radioisotope in nuclear medicine, a gamma emitter having a half-life of 6.01 hours.
   Found on http://www.mercksource.com/pp/us/cns/cns
   
   
9. 
   technetium
   chemical element, synthetic radioactive metal of Group VIIb of the periodic table, the first element to be artificially produced. The isotope ... [4 related articles]
   Found on http://www.britannica.com/eb/a-z/t/19
   
   
10. 
    technetium
    An artificial radioactive element, atomic no. 43, atomic wt. 99, produced in 1937 by bombardment of molybdenum by deuterons; also a product of the fission of 235U; used extensively as a radiographic tracer in imaging studies of internal organs. [G. technetos, artificial]
    Found on
    
    
11. 
    technetium
    technetium (teknē'shēum) [Gr. technetos=artificial], artificially produced radioactive chemical element; symbol Tc; at. no. 43; mass no. of most stable isotope 98; m.p. 2,200°C; b.p. 4,877°C; sp. gr. 11.5 (calculated); valence +4, +6, or +7. Technetium is a radioactive silver...
    Found on http://www.infoplease.com/ce6/sci/A08480