4Be
Element 4
Beryllium
Alkaline earth
Beryllium is a chemical element with symbol Be and atomic number 4.
Key data
- Atomic number
- 4
- Atomic mass
- 9.012 u
- Group / Period
- 2 / 2
- Block
- s-block
- Phase at STP
- Solid
- Density
- 1.85 g/cm³
- Melting point
- 1286.8 °C
- Boiling point
- 2468.8 °C
- Electron configuration
- [He] 2s2
Common uses
- •Aerospace components
- •X-ray windows
- •Nuclear reactors
Discovery
Year: 1798
Discovered by: Louis Nicolas Vauquelin
Frequently asked questions
What is the atomic number of Beryllium?
Beryllium has atomic number 4. Its symbol is Be and its atomic mass is 9.012 u.
What category of element is Beryllium?
Beryllium is classified as alkaline earth. It sits in group 2, period 2 of the periodic table.
What is Beryllium used for?
Common uses of Beryllium include: Aerospace components, X-ray windows, Nuclear reactors.
When was Beryllium discovered?
Beryllium was discovered in 1798 by Louis Nicolas Vauquelin.
Play the game
Test your knowledge in The Lab
20-round element ID, cryptic 3-clue guesser, and an interactive periodic table.
Open The Lab →