Sodium Piece 99.95% (3-12mm)
Sodium is a chemical element with symbol Na(from 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, because it has a single electron in its outer shell that it readily donates, creating a positively charged ion—the Na+ cation. Its only stable isotope is 23Na.
| Phase at STP | solid |
|---|---|
| Melting point | 370.944 K (97.794 °C, 208.029 °F) |
| Boiling point | 1156.090 K (882.940 °C, 1621.292 °F) |
| Density (near r.t.) | 0.968 g/cm3 |
| when liquid (at m.p.) | 0.927 g/cm3 |
| Critical point | 2573 K, 35 MPa (extrapolated) |
| Heat of fusion | 2.60 kJ/mol |
| Heat of vaporization | 97.42 kJ/mol |
| Molar heat capacity |
28.230 J/(mol·K) |