4Be9.012183
Beryllium
Alkaline Earth Metal
Solid at STP
Period 2Group 2Block SDiscovered 1798
[He]2s2
Beryllium is a chemical element with symbol Be and atomic number 4. It is created through stellar nucleosynthesis and is a relatively rare element in the universe. It is a divalent element which occurs naturally only in combination with other elements in minerals.
📖 Read more on Wikipedia →Atomic Properties
| Atomic Number | 4 |
| Atomic Mass | 9.012183 u |
| Electron Configuration | [He]2s2 |
| Oxidation States | +2 |
| Electronegativity | 1.57 (Pauling) |
| Atomic Radius | 153 pm |
| Ionization Energy | 9.323 eV |
| Block | S |
Physical Properties
| Appearance | white-gray metallic |
| Standard State | Solid |
| Melting Point | 1560 K (1286.8 °C) |
| Boiling Point | 2744 K (2470.8 °C) |
| Density | 1.85 g/cm³ |
| Molar Heat | 16.443 J/(mol·K) |
| CPK Color | #C2FF00 |
Classification
| Category | Alkaline Earth Metal |
| Group Block | Alkaline earth metal |
| Period | 2 |
| Group | 2 |
| Block | S |
Discovery
| Year Discovered | 1798 |
| Discovered By | Louis Nicolas Vauquelin |
| Electron Shells | 2, 2 |