atomic number 104
— Navneord
– Engelsk
～ a radioactive transuranic element which has been synthesized
atomic number 102
— Navneord
– Engelsk
～ a radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known
atomic number 75
— Navneord
– Engelsk
～ 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
atomic number 69
— Navneord
– Engelsk
～ a soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime
atomic number 90
— Navneord
– Engelsk
～ 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
atomic number 54
— Navneord
– Engelsk
～ a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts
atomic number 100
— Navneord
– Engelsk
～ a radioactive transuranic metallic element produced by bombarding plutonium with neutrons
atomic number 47
— Navneord
– Engelsk
～ 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
atomic number 81
— Navneord
– Engelsk
～ a soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron ores
atomic number 77
— Navneord
– Engelsk
～ a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium
atomic number 89
— Navneord
– Engelsk
～ a radioactive element of the actinide series; found in uranium ores
atomic number 74
— Navneord
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～ a heavy grey-white metallic element; the pure form is used mainly in electrical applications; it is found in several ores including wolframite and scheelite
atomic number 25
— Navneord
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～ a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals
atomic number 31
— Navneord
– Engelsk
～ a rare silvery (usually trivalent) metallic element; brittle at low temperatures but liquid above room temperature; occurs in trace amounts in bauxite and zinc ores
atomic number 72
— Navneord
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～ a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
atomic number 10
— Navneord
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～ 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
atomic number 4
— Navneord
– Engelsk
～ a light strong brittle grey toxic bivalent metallic element
atomic number 52
— Navneord
– Engelsk
～ 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
atomic number 50
— Navneord
– Engelsk
～ a silvery malleable metallic element that resists corrosion; used in many alloys and to coat other metals to prevent corrosion; obtained chiefly from cassiterite where it occurs as tin oxide