ChemicalElements

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Element Symbol AtomicNumber ChemicalPropertyId OriginOfName Group Period AtomicWeight AtomicWeightUncertainty Density MeltingPoint BoilingPoint HeatCapacity Electronegativity AbundanceInEarthsCrust
Chlorine Cl 17 Reactive nonmetal the Greek chloros, 'greenish yellow' 17 3 35.45 0.00 171.60 239.11 0.48 3.16 145.00
Sulfur S 16 Reactive nonmetal the Latin sulphur, 'fire and brimstone' 16 3 32.06 2.07 388.36 717.87 0.71 2.58 350.00
Phosphorus P 15 Reactive nonmetal the Greek phoosphoros, 'carrying light' 15 3 30.97 0.00 1.82 317.30 550.00 0.77 2.19 1050.00
Silicon Si 14 Metalloid from the Latin silex, 'flint' (originally silicium) 14 3 28.09 2.33 1687.00 3538.00 0.71 1.90 282000.00
Aluminium Al 13 Post-​transition metal from alumina, a compound (originally alumium) 13 3 26.98 0.00 2.70 933.47 2792.00 0.90 1.61 82300.00
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
Sodium Na 11 Alkali metal the English word soda (natrium in Latin) 1 3 22.99 0.00 0.97 370.87 1156.00 1.23 0.93 23600.00
Argon Ar 18 Noble gas the Greek argos, 'idle' 18 3 39.95 0.00 0.00 83.80 87.30 0.52 3.50
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
Calcium Ca 20 Alkaline earth metal the Latin calx, 'lime' 2 4 40.08 0.00 1.54 1115.00 1757.00 0.65 1.00 41500.00