1. atomic number 30 a bluish-white lustrous metallic element
  2. 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
  3. atomic number 40 a lustrous grey strong metallic element resembling titanium
  4. 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
  5. atomic number 35 a nonmetallic heavy volatile corrosive dark brown liquid element belonging to the halogens; found in sea water
  6. atomic number 32 a brittle grey crystalline element that is a semiconducting metalloid (resembling silicon) used in transistors; occurs in germanite and argyrodite
  7. atomic number 36 a colorless element that is one of the six inert gasses
  8. 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
  9. atomic number 20 a white metallic element that burns with a brilliant light
  10. atomic number 31 a rare silvery metallic element
  11. atomic number 34 a toxic nonmetallic element related to sulfur and tellurium
  12. atomic number 37 a soft silvery metallic element of the alkali metal group
  13. atomic number 38 a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite
  14. atomic number 39 a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys
  15. atomic number 50 a silvery malleable metallic element that resists corrosion
  16. atomic number 60 a yellow trivalent metallic element of the rare earth group
  17. atomic number 70 a soft silvery metallic element
  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 3 a soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several minerals
  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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