Argon

Argon

Atomic number 18

Atomic weight 39.948

Discovery (year) 1894

Atomic radius (A) 1.91

Melting point (^oC) -189.2

Boiling point (^oC) -185.9

Density (g/cm³) 1.784

Specific heat (cal/g ^oC) 0.125

Ionization potential (eV) 15.759

Electron Affinity (eV) 0

Atomic number	18
Atomic weight	39.948
Discovery (year)	1894
Atomic radius (A)	1.91
Melting point (^oC)	-189.2
Boiling point (^oC)	-185.9
Density (g/cm³)	1.784
Specific heat (cal/g ^oC)	0.125
Ionization potential (eV)	15.759
Electron Affinity (eV)	0