- Atomic Radius (Å)
Sodium /ˈsoʊdiəm/ is a chemical element with symbol Na (from Ancient Greek Νάτριο) and atomic number 11. It is a soft, silver-white, highly reactive metal. In the Periodic table it is in column 1 (alkali metals), and shares with the other six elements in that column that it has a single electron in its outer shell, which it readily donates, creating a positively charged atom - a cation.
11
Atomic Number
22.99
Atomic Mass (u)
371.15
Melting Point (K)
1156
Boiling Point (K)
0.97
Density (solid: g/cm³, gas: g/liter)
2.2
Atomic Radius (Å)
1.66
Covalent Radius (Å)
0.93
Electronegativity
5.14
First Ionization Energy (eV)
52.87
Electron Affinity
3
Number of Shells
1
Electron Valency
2, 8, 1
Electron Shell Occupations
1.23
Specific Heat (J/g)