ChemicalElements

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Element Symbol AtomicNumber ChemicalPropertyId OriginOfName Group Period AtomicWeight AtomicWeightUncertainty Density MeltingPoint BoilingPoint HeatCapacity Electronegativity AbundanceInEarthsCrust
Radon Rn 86 Noble gas From radium, as it was first detected as an emission from radium during radioactive decay 18 6 0.01 202.00 211.30 0.09 2.20 0.00
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
Neon Ne 10 Noble gas the Greek neos, meaning 'new' 18 2 20.18 0.00 0.00 24.56 27.07 1.03 0.01
Helium He 2 Noble gas the Greek helios, 'sun' 18 1 4.00 0.00 0.00 4.22 5.19 0.01
Xenon Xe 54 Noble gas the Greek xenos, 'strange' 18 5 131.29 0.01 0.01 161.40 165.03 0.16 2.60 0.00
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
Rubidium Rb 37 Alkali metal the Latin rubidus, 'deep red' 1 5 85.47 0.00 1.53 312.46 961.00 0.36 0.82 90.00
Caesium Cs 55 Alkali metal the Latin caesius, 'sky blue' 1 6 132.91 0.00 1.87 301.59 944.00 0.24 0.79 3.00
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
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