ChemicalElements

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Element Symbol AtomicNumber ChemicalPropertyId OriginOfName Group Period AtomicWeight AtomicWeightUncertainty Density MeltingPoint BoilingPoint HeatCapacity Electronegativity AbundanceInEarthsCrust
Dysprosium Dy 66 Lan­thanide the Greek dysprositos, 'hard to get' 6 162.50 0.00 8.55 1680.00 2840.00 0.17 1.22 5.20
Terbium Tb 65 Lan­thanide Ytterby, Sweden 6 158.93 0.00 8.23 1629.00 3503.00 0.18 1.20 1.20
Gadolinium Gd 64 Lan­thanide Johan Gadolin, chemist, physicist and mineralogist 6 157.25 0.03 7.90 1585.00 3546.00 0.24 1.20 6.20
Europium Eu 63 Lan­thanide Europe 6 151.96 0.00 5.24 1099.00 1802.00 0.18 1.20 2.00
Samarium Sm 62 Lan­thanide Samarskite, the name of the mineral from which it was first isolated 6 150.36 0.02 7.52 1345.00 2067.00 0.20 1.17 7.05
Neodymium Nd 60 Lan­thanide the Greek neos didymos meaning 'new twin' 6 144.24 0.00 7.01 1297.00 3347.00 0.19 1.14 41.50
Praseodymium Pr 59 Lan­thanide the Greek praseios didymos meaning 'green twin' 6 140.91 0.00 6.77 1208.00 3793.00 0.19 1.13 9.20
Cerium Ce 58 Lan­thanide the then recently discovered asteroid Ceres, considered a planet at the time 6 140.12 0.00 6.77 1068.00 3716.00 0.19 1.12 66.50
Lanthanum La 57 Lan­thanide the Greek lanthanein, 'to lie hidden' 3 6 138.91 0.00 6.15 1193.00 3737.00 0.20 1.10 39.00
Barium Ba 56 Alkaline earth metal the Greek barys, 'heavy' 2 6 137.33 0.01 3.59 1000.00 2170.00 0.20 0.89 425.00