Sodium: a chemical element with the symbol Na, atomic number 11, and atomic weight 22.9898 g/mol. It is a soft, reactive metal with a low melting point and a relative density of 0.97 at 20 ºC (68 ºF).
Sodium: a chemical element with the symbol Na, atomic number 11, and atomic weight 22.9898 g/mol. It is a soft, reactive metal with a low melting point and a relative density of 0.97 at 20 ºC (68 ºF).