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 ...

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Initially, Ramsay looked for the new element in rock samples, but around this time, a new breakthrough in science began to emerge ... about twice as heavy as argon and is the element beneath argon in ...