1. atomic number 24 a hard brittle multivalent metallic element
  2. atomic number 54 a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts
  3. atomic number 29 a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; occurs in various minerals but is the only metal that occurs abundantly in large masses; used as an electrical and thermal conductor
  4. atomic number 14 a tetravalent nonmetallic element
  5. atomic number 25 a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals
  6. atomic number 94 a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons; found in minute quantities in uranium ores but is usually synthesized in nuclear reactors; 13 isotopes are known with the most important being plutonium 239
  7. atomic number 21 a white trivalent metallic element
  8. atomic number 22 a light strong grey lustrous corrosion-resistant metallic element used in strong lightweight alloys (as for airplane parts); the main sources are rutile and ilmenite
  9. atomic number 27 a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition
  10. atomic number 26 a heavy ductile magnetic metallic element
  11. atomic number 64 a ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth group
  12. atomic number 74 a heavy grey-white metallic element
  13. atomic number 84 a radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor
  14. atomic number 20 a white metallic element that burns with a brilliant light
  15. atomic number 23 a soft silvery white toxic metallic element used in steel alloys; it occurs in several complex minerals including carnotite and vanadinite
  16. atomic number 28 a hard malleable ductile silvery metallic element that is resistant to corrosion; used in alloys; occurs in pentlandite and smaltite and garnierite and millerite
  17. atomic number 34 a toxic nonmetallic element related to sulfur and tellurium
  18. atomic number 42 a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel
  19. atomic number 44 a rare polyvalent metallic element of the platinum group
  20. atomic number 4 a light strong brittle grey toxic bivalent metallic element

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