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Argon
(Ar)
Ar
Category
Noble gas
Relative atomic mass
39.948
Density
0.0017839
Melting point (°C)
-189.2
Boiling point (°C)
-185.7
Electronegativity (Pauling)
0
Discovery year
1894
Discovered by
William Ramsay and Lord Rayleigh
created by @lukaswyss
Argon (Ar) – Element 18