ChemicalElements

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Element Symbol AtomicNumber ChemicalPropertyId OriginOfName Group Period AtomicWeight AtomicWeightUncertainty Density MeltingPoint BoilingPoint HeatCapacity Electronegativity AbundanceInEarthsCrust
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
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
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
Helium He 2 Noble gas the Greek helios, 'sun' 18 1 4.00 0.00 0.00 4.22 5.19 0.01
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
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