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 ...

And what is the chemical symbol for aluminium? Mrs Roberts: So, the chemical symbol is Al. See if you can see it in the periodic table. Cal: OK. It is. It's on the right hand side. It's right there.

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 ...