1. atomic number 67 a trivalent metallic element of the rare earth group
  2. atomic number 77 a heavy brittle metallic element of the platinum group
  3. atomic number 47 a soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal; occurs in argentite and in free form; used in coins and jewelry and tableware and photography
  4. atomic number 76 a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known
  5. atomic number 66 a trivalent metallic element of the rare earth group
  6. atomic number 17 a common nonmetallic element belonging to the halogens
  7. atomic number 87 a radioactive element of the alkali-metal group discovered as a disintegration product of actinium
  8. atomic number 27 a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition
  9. atomic number 61 a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium
  10. atomic number 64 a ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth group
  11. atomic number 97 a radioactive transuranic element
  12. atomic number 37 a soft silvery metallic element of the alkali metal group
  13. atomic number 57 a white soft metallic element that tarnishes readily
  14. atomic number 60 a yellow trivalent metallic element of the rare earth group
  15. atomic number 62 a grey lustrous metallic element of the rare earth group
  16. atomic number 63 a bivalent and trivalent metallic element of the rare earth group
  17. atomic number 65 a metallic element of the rare earth group
  18. atomic number 68 a trivalent metallic element of the rare earth group
  19. atomic number 69 a soft silvery metallic element of the rare earth group
  20. atomic number 6 an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds