1. atomic number 70 a soft silvery metallic element
  2. atomic number 77 a heavy brittle metallic element of the platinum group
  3. atomic number 10 a colorless odorless gaseous element that give a red glow in a vacuum tube; one of the six inert gasses; occurs in the air in small amounts
  4. atomic number 75 a rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum
  5. atomic number 76 a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known
  6. atomic number 78 a heavy precious metallic element
  7. atomic number 40 a lustrous grey strong metallic element resembling titanium
  8. atomic number 90 a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands
  9. atomic number 73 a hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite
  10. atomic number 74 a heavy grey-white metallic element
  11. atomic number 79 a soft yellow malleable ductile metallic element
  12. atomic number 20 a white metallic element that burns with a brilliant light
  13. atomic number 30 a bluish-white lustrous metallic element
  14. atomic number 50 a silvery malleable metallic element that resists corrosion
  15. atomic number 60 a yellow trivalent metallic element of the rare earth group
  16. atomic number 71 a trivalent metallic element of the rare earth group
  17. atomic number 72 a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
  18. atomic number 80 a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures
  19. atomic number 7 a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues
  20. atomic number 101 a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium but Mv was formerly the symbol)

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