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 ...

3rd Period: Sodium to argon—Electrons go into the third energy level ... The sodium reacts with the water and gets very hot, producing sodium hydroxide and hydrogen gas. The demonstration shown in ...

Unless you currently work in a field that involves science (or you crack chemistry jokes regularly), the days of memorizing ...