Na
Sodium
Element 11 · Alkali metal · Period 3, Group 1
Solid · Discovered 1807
Atomic Properties
| Atomic Number | 11 |
| Atomic Mass | 22.9897693u |
| Electron Configuration | [Ne]3s1 |
| Electronegativity | 0.93Pauling |
| Atomic Radius | 227pm |
| Ionization Energy | 5.139eV |
| Electron Affinity | 0.548eV |
| Oxidation States | +1 |
Physical Properties
| Standard State | Solid |
| Melting Point | 370.95K |
| Boiling Point | 1156K |
| Density | 0.97g/cm³ |
| Group Block | Alkali metal |
| Year Discovered | 1807 |