1. atomic number 53 a nonmetallic element belonging to the halogens
  2. atomic number 54 a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts
  3. atomic number 58 a ductile grey metallic element of the lanthanide series
  4. atomic number 13 a silvery ductile metallic element found primarily in bauxite
  5. atomic number 35 a nonmetallic heavy volatile corrosive dark brown liquid element belonging to the halogens; found in sea water
  6. atomic number 52 a brittle silver-white metalloid element that is related to selenium and sulfur; it is used in alloys and as a semiconductor; occurs mainly as tellurides in ores of copper and nickel and silver and gold
  7. atomic number 43 a crystalline metallic element not found in nature
  8. atomic number 73 a hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite
  9. atomic number 83 a heavy brittle diamagnetic trivalent metallic element
  10. atomic number 33 a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar
  11. atomic number 93 a radioactive transuranic metallic element
  12. atomic number 23 a soft silvery white toxic metallic element used in steel alloys; it occurs in several complex minerals including carnotite and vanadinite
  13. atomic number 50 a silvery malleable metallic element that resists corrosion
  14. atomic number 51 a metallic element having four allotropic forms
  15. atomic number 55 a soft silver-white ductile metallic element
  16. atomic number 56 a soft silvery metallic element of the alkali earth group
  17. atomic number 57 a white soft metallic element that tarnishes readily
  18. atomic number 59 a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process
  19. atomic number 63 a bivalent and trivalent metallic element of the rare earth group
  20. atomic number 5 a trivalent metalloid element

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.