Liquid sodium is sometimes used to cool nuclear reactors. It is the most abundant of the alkali metals. It never exists in nature, but is prepared by electrolysis of absolutely dry fused sodium chloride.
Sodium chloride is common table salt which is important in animal nutrition.
In nature sodium is fount in soda niter, cryolite, amphibole and zeolite. It was isolated by Davy in 1807. Ionic Radius Ionization Potential Mass Average Melting Point Name Periodic Table Series Symbol Thermal Conductivity Year of Discovery Search the Web.