Be
Beryllium
Element 4 · Alkaline earth metal · Period 2, Group 2
Solid · Discovered 1798
Atomic Properties
| Atomic Number | 4 |
| Atomic Mass | 9.012183u |
| Electron Configuration | [He]2s2 |
| Electronegativity | 1.57Pauling |
| Atomic Radius | 153pm |
| Ionization Energy | 9.323eV |
| Oxidation States | +2 |
Physical Properties
| Standard State | Solid |
| Melting Point | 1560K |
| Boiling Point | 2744K |
| Density | 1.85g/cm³ |
| Group Block | Alkaline earth metal |
| Year Discovered | 1798 |