ChemicalElements

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Element Symbol AtomicNumber ChemicalPropertyId OriginOfName Group Period AtomicWeight AtomicWeightUncertainty Density MeltingPoint BoilingPoint HeatCapacity Electronegativity AbundanceInEarthsCrust
Tantalum Ta 73 Transition metal King Tantalus, father of Niobe from Greek mythology 5 6 180.95 0.00 16.65 3290.00 5731.00 0.14 1.50 2.00
Tellurium Te 52 Metalloid Latin tellus, 'earth' 16 5 127.60 0.03 6.23 722.66 1261.00 0.20 2.10 0.00
Livermorium Lv 116 Unknown chemical properties Lawrence Livermore National Laboratory (in Livermore, California) which collaborated with JINR on its synthesis 16 7 -12.90 -709.00 -1085.00 0.00
Meitnerium Mt 109 Unknown chemical properties Lise Meitner, physicist 9 7 -37.40 0.00
Lutetium Lu 71 Lan­thanide Lutetia, the Latin name for Paris 6 174.97 0.00 9.84 1925.00 3675.00 0.15 1.27 0.80
Magnesium Mg 12 Alkaline earth metal Magnesia, a district of Eastern Thessaly in Greece 2 3 24.31 0.00 1.74 923.00 1363.00 1.02 1.31 23300.00
Moscovium Mc 115 Unknown chemical properties Moscow Oblast, Russia, where the element was first synthesized 15 7 -13.50 -700.00 -1400.00 0.00
Polonium Po 84 Post-​transition metal Named after the home country of Marie Curie (Polonia, Latin for Poland), who is also the discoverer of Radium 16 6 9.32 527.00 1235.00 2.00 0.00
Neptunium Np 93 Actinide Neptune, the eighth planet in the Solar System 7 20.45 917.00 4273.00 1.36 0.00
Potassium K 19 Alkali metal New Latin potassa, 'potash' (kalium in Latin) 1 4 39.10 0.00 0.86 336.53 1032.00 0.76 0.82 20900.00