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Ar - Argon - periodic table of the elements

Argon is an inert gas used for its blue and green lumination of emission. Argon was found by William Ramsey and Rayleigh in a 1894 experiment in which they removed all of the oxygen and nitrogen from the air.


Atomic number - 18 Density g/mL 0 .001784
Atomic weight u 39 .948 Melting point K 83 .81
Bonding radius A 0 .98 Boiling point K 87 .3
Atomic radius A 0 .88 Heat of vaporization kJ/mol 6 .447
Ionization Potential V 15 .759 Heat of fusion kJ/mol 1 .188
Electronegativity - - Specific heat J/gK 0 .52
The oxide is unknown.
Crystal are face centered cubic.

Electron configuration: [Ne] 3s2 3p6

Other elements of the periodic table

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HHe
LiBeBCNOFNe
NaMgAlSiPSClAr
KCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBaLa * HfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRaAc ** RfDbSgBhHsMt110111112113
Lanthanides* CePrNdPmSmEuGdTbDyHoErTmYbLu
Actinides ** ThPaUNpPuAmCmBkCfEsFmMdNoLr