Argon is an inert gas in group VIII A of the periodic table with atomic number 18, an atomic weight of 39.948, and a density of 1.40 Mg/m 3. In the solid state it forms an fcc crystal with a melting ...

The density of argon has been carefully determined by Ramsay, who, as the result of numerous experiments, announced 19.96 as the true value for the density of the gas; this would correspond to a ...