sodium -
a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt)
metallic element,
metal any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
sodium -
A soft, waxy, silvery reactive metal that is never found unbound in nature, and a chemical element symbol Na with an atomic number of 11 and atomic weight of 22. 98977.
Wikipedia
Sodium is a metallic element with a symbol Na (from Latin natrium or Arabic ناترون natrun; perhaps ultimately from Egyptian netjerj) and atomic number 11. It is a soft, silvery-white, highly reactive metal and is a member of the alkali metals within "group 1" (formerly known as ‘group IA’). It has only one stable isotope, Na.
OmegaWiki Dictionary
Ω
sodium A soft silvery metallic element with the symbol Na and atomic number 11, occurs principally as table salt (sodium chloride) and as the minerals amphibole, cryolite, halite, zeolite.
