atomic number 27
— Noun
– English
～ a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition
atomic number 53
— Noun
– English
～ a nonmetallic element belonging to the halogens; used especially in medicine and photography and in dyes; occurs naturally only in combination in small quantities (as in sea water or rocks)
atomic number 14
— Noun
– English
～ a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
atomic number 5
— Noun
– English
～ a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder
atomic number 65
— Noun
– English
～ a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite
atomic number 45
— Noun
– English
～ a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum
atomic number 70
— Noun
– English
～ a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime
atomic number 48
— Noun
– English
～ a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores
atomic number 1
— Noun
– English
～ a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe
atomic number 85
— Noun
– English
～ a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
atomic number 88
— Noun
– English
～ an intensely radioactive metallic element that occurs in minute amounts in uranium ores
atomic number 104
— Noun
– English
～ a radioactive transuranic element which has been synthesized
atomic number 102
— Noun
– English
～ a radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known
atomic number 75
— Noun
– English
～ 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
— Noun
– English
～ 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
— Noun
– English
～ 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
— Noun
– English
～ a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts
atomic number 100
— Noun
– English
～ a radioactive transuranic metallic element produced by bombarding plutonium with neutrons
atomic number 47
— Noun
– English
～ 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
— Noun
– English
～ 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