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Argon

18
Ar
39.948
Argon
 General | States | Energies | Oxidation & Electrons | Appearance & Characteristics | Reactions | Other Forms Radius | Conductivity | Abundance

General:

Name: Argon Symbol: Ar
Group: Noble Gas Atomic weight: 39.948
Density @ 293 K: 0.0017824 g/cm3 Atomic volume: 28.5 cm3/mol
Group: Noble Gas discovered: 1894

States:

state (s, l, g): g
melting point: 84 K boiling point: 87.3 K
Heat of fusion: 1.188 kJ/mol Heat of vaporization: 6.447 kJ/mol

Energies:

1st ionization energy: 1520.5 kJ/mole
electronegativity: 2nd ionization energy: 2665.8 kJ/mole
electron affinity: kJ/mole 3rd ionization energy: 3930.8 kJ/mole
Specific heat: 0.520 J/gK heat atomization: 0 kJ/mole atoms

Oxidation & Electrons:

Shells: 2,8,8 electron configuration: [Ne] 3s2 3p6
minimum oxidation number: 0 maximum oxidation number: 0
min. common oxidation no.: 0 max. common oxidation no.: 0

Appearance & Characteristics:

structure: fcc: face-centered cubic color: colorless
uses: lasers, light bulbs toxicity: no
hardness: mohs characteristics: Inert

Reactions:

reaction with air: none
reaction with 6M HCl: none reaction with 6M HCl: none
reaction with 15M HNO3: none reaction with 6M NaOH: none

Other Forms:

number of isotopes: 3 hydride(s): none
oxide(s): none chloride(s): none

Radius:

ionic radius (2- ion): pm ionic radius (1- ion): pm
atomic radius: 98 pm ionic radius (1+ ion): pm
ionic radius (2+ ion): pm ionic radius (3+ ion): pm

Conductivity:

thermal conductivity: 0.02 J/m-sec-deg
electrical conductivity: 0 1/mohm-cm polarizability: 1.586 A^3

Abundance:

source: Air
rel. abund. solar system: 5.004 log abundance earth's crust: 0.5 log
cost, pure: 0.5 $/100g cost, bulk: $/100g