Sodium is a chemical element; it has symbol Na (from Neo-Latin natrium) and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is 23Na.
Sodium is a chemical element; it has symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is ²³Na. The free metal does not occur in nature and must be prepared from compounds.
Symbol: Na
Atomic mass: 22.989769 u
Atomic number: 11
Electron configuration: [Ne] 3s¹
Boiling point: 882.8 °C
Van der Waals radius: 227 pm
Electronegativity: 0.93
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