Beryllium
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Explanationedit
Beryllium is an element of the periodic table with atomic number 4. It is a rare element and only occurs in compounds containing other elements naturally. In elemental form it is a lightweight and brittle alkaline earth metal. Some uses of it include aerospace components and particle detectors. It has only one stable isotope, namely 9Be . It has the electron configuration [He] 2s2.
Propertiesedit
| Symbol | Be |
|---|---|
| Atomic number | 4 |
| Atomic mass | 9.012 g/mol |
| Melting point | 1287 °C (1560 K) |
| Boiling point | 2469 °C (2742 K) |
| Density | 1.85 g/cm3 at r.t. |
FAQsedit
Why isn't Be formed in stars?edit
Because it gets quickly depleted and fused into heavier elements.