Element of rare earth group
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CERIUMElement of rare-earth group.
terbiumsa metallic element of the rare-earth group see element table
lanthanuma rare element of the group of the earth metals, allied to aluminium
lanthanumsLANTHANUM, a rare element of the group of the earth metals, allied to aluminium
holmiumsa metallic element of the rare-earth group that forms highly magnetic compounds and is obtained especially from monazite see element table
holmiuma metallic element of the rare-earth group that forms highly magnetic compounds and is obtained especially from monazite see element table
ceriumssteel-gray, ductile metallic element of the rare-earth group found only in combination. Symbol: Ce; at. wt.: 140.12; at. no.: 58
ceriumsteel-gray, ductile metallic element of the rare-earth group found only in combination. Symbol: Ce; at. wt.: 140.12; at. no.: 58
yttriumsa metallic element usually included in the rare-earth group that occurs usually with other rare earth elements in minerals and is used especially in phosphors, YAG lasers, and superalloys see element table
lanthanumThe chemical element of atomic number 57, a silvery-white rare earth metal
ERBIUMRare-earth element.
YTTRIUMRare-earth element.
CERIUMRare-earth element
SCANDIUMRare earth element
lanthanidea rare-earth element
lanthanidesLANTHANIDE, a rare-earth element
promethiuma radioactive rare-earth element also PROMETHEUM
promethiumsPROMETHIUM, a radioactive rare-earth element also PROMETHEUM
SCANDIUMRare-earth element named after where it was discovered
lutetiumtrivalent rare-earth element. Symbol: Lu; at. wt.: 174.97; at. no.: 71
luteciumtrivalent rare-earth element. Symbol: Lu; at. wt.: 174.97; at. no.: 71
holmiumrare-earth, trivalent element found in gadolinite. Symbol: Ho; at. wt.: 164.930; at. no.: 67
erbiumsrare-earth metallic element, having pink salts. Symbol: Er; at. wt.: 167.26; at. no.: 68
erbiumrare-earth metallic element, having pink salts. Symbol: Er; at. wt.: 167.26; at. no.: 68
europiumrare-earth metallic element whose salts are light pink. Symbol: Eu; at. wt.: 151.96; at. no.: 63
thuliumsrare-earth metallic element found in the minerals euxenite, gadolinite, etc. Symbol: Tm; at. wt.: 168.934; at. no.: 69; sp. gr.: 9.32
thuliumrare-earth metallic element found in the minerals euxenite, gadolinite, etc. Symbol: Tm; at. wt.: 168.934; at. no.: 69; sp. gr.: 9.32
terbiumrare-earth, metallic element present in certain minerals and yielding colorless salts. Symbol: Tb; at. no.: 65; at. wt.: 158.924; sp. gr.: 8.25
terbicrare-earth, metallic element present in certain minerals and yielding colorless salts. Symbol: Tb; at. no.: 65; at. wt.: 158.924; sp. gr.: 8.25
praseodymiumrare-earth, metallic, trivalent element, named from its green salts. Symbol: Pr; at. wt.: 140.91; at. no.: 59; sp. gr.: 6.77 at 20┬░C
didymiumA mixture containing the rare earth elements praseodymium and neodymium, used to color glass for optical filters. It was originally regarded as a single element
molybdenuma rare element of the chromium group
zirconiuma rare element of the carbon-silicon group
ytterbium(Swedish) a rare element of the boron group
molybdenumsMOLYBDENUM, a rare element of the chromium group
zirconiumsZIRCONIUM, a rare element of the carbon-silicon group
ytterbiumsYTTERBIUM, (Swedish) a rare element of the boron group
columbiuma rare element of the vanadium group, now more commonly called niobium
columbiumsCOLUMBIUM, a rare element of the vanadium group, now more commonly called niobium
caesiumsrare, highly reactive, soft, metallic element of the alkali metal group, used chiefly in photoelectric cells. Symbol: Cs; at. wt.: 132.905; at. no.: 55; sp. gr.: 1.9 at 20┬░C; melts at 28.5┬░C