Sodium is a chemical element with the symbol Na (from Latin: natrium) and atomic number 11. It is a soft, silvery-white, highly reactive metal and is a member of the alkali metals; its only stable isotope is 23Na. The free metal does not occur in nature, but instead must be prepared from its compounds; it was first isolated by Humphry Davy in 1807 by the electrolysis of sodium hydroxide.Symbol: Na
Atomic number: 11
Electron configuration: Ne 3s1
Melting Point: 97.72 °C
Atomic mass: 22.989769 ± 0.00000002 u
Discoverers: Humphry Davy