4Be9.0122
Beryllium
Alkaline earth metal · element 4 · group 2, period 2
Quick facts
| Symbol | Be |
|---|---|
| Atomic number | 4 |
| Relative atomic mass | 9.0122 |
| Category | Alkaline earth metal |
| Position | group 2, period 2 |
| State at 20 °C | Solid |
| Melting point | 1,287 °C |
| Boiling point | 2,470 °C |
| Density | 1.85 g/cm³ |
| Electronegativity | 1.57 |
| Electron configuration | [He] 2s2 |
About Beryllium
Beryllium has the symbol Be and atomic number 4, which means every beryllium atom has 4 protons in its nucleus and, in a neutral atom, 4 electrons. At room temperature it is a solid.
Alkaline earth metals are in group 2. They are reactive metals (less reactive than group 1) that form compounds with a 2+ charge.
It melts at 1,287 °C and boils at 2,470 °C.
Explore it
See where beryllium sits, and drag the temperature slider to watch it melt and boil, on the interactive periodic table. Practise with quizzes on OmniEx.