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 ...

Argon on periodic table of the elements, with element symbol Ar Argon on periodic table of elements. Noble gas, with symbol Ar and atomic number 18, used as inert shielding gas, in incandescent, ...

There are currently 118 known elements on the periodic table, and we've put 20 of them ... Do you know what element Ar is? Ar ...

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They named this gas argon from the Greek for lazy or inactive to reflect its extreme inertness. The problem was, where did this new element fit into Mendeleev's periodic table of the elements? There ...