ChemicalElements

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Element Symbol AtomicNumber ChemicalPropertyId OriginOfName Group Period AtomicWeight AtomicWeightUncertainty Density MeltingPoint BoilingPoint HeatCapacity Electronegativity AbundanceInEarthsCrust
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
Krypton Kr 36 Noble gas the Greek kryptos, 'hidden' 18 4 83.80 0.00 0.00 115.79 119.93 0.25 3.00 0.00
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
Lithium Li 3 Alkali metal the Greek lithos, 'stone' 1 2 6.94 0.00 0.53 453.69 1560.00 3.58 0.98 20.00
Lawrencium Lr 103 Actinide Ernest O. Lawrence, physicist 7 -15.60 -1900.00 1.30 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
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
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
Mendelevium Md 101 Actinide Dmitri Mendeleev, chemist and inventor 7 -10.30 -1100.00 1.30 0.00
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