Beryllium (Be) — Alkaline earth metal. Atomic number 4.
Silvery-white, relatively soft, low-density metal
- Atomic number: 4
- Symbol: Be
- Atomic mass: 9.0122 u
- Category: Alkaline earth metal
- State: Solid
- Melting point: 1286.85 °C / 1560 K
- Boiling point: 2467.85 °C / 2741 K
- Density: 1.85 g/cm³ (20°C)
- Electron configuration: [He] 2s2
- Oxidation states: +2
- Electronegativity: 1.57
- Discovered by: Louis Nicolas Vauquelin (1798)
Common uses: Copper and nickel alloys, Aerospace components, X-ray windows, Nuclear reactor neutron reflectors
Biological role: No known biological role.
Frequently Asked Questions about Beryllium
What is the atomic number of beryllium?
Beryllium has an atomic number of 4, meaning each atom contains 4 protons in its nucleus.
What is the atomic mass of beryllium?
The standard atomic weight of beryllium is 9.0122 u (unified atomic mass units).
What category does beryllium belong to?
Beryllium is classified as a alkaline earth metal.
What is the state of beryllium at room temperature?
Beryllium is a solid at 20 °C (68 °F).
What is the melting point of beryllium?
The melting point of beryllium is 1286.85 °C / 1560 K.
What is the boiling point of beryllium?
The boiling point of beryllium is 2467.85 °C / 2741 K.
What is the density of beryllium?
The density of beryllium is 1.85 g/cm³ (20°C).
What is the electronegativity of beryllium?
Beryllium has a Pauling electronegativity of 1.57.
What is the electron configuration of beryllium?
The electron configuration of beryllium is [He] 2s2.
What are the common oxidation states of beryllium?
Beryllium commonly exhibits the following oxidation states: +2.
When was beryllium discovered?
Beryllium was discovered in 1798 by Louis Nicolas Vauquelin.
Is beryllium radioactive?
Beryllium is a stable element with no naturally occurring radioactive isotopes.
What is the biological role of beryllium?
No known biological role.
What are the common uses of beryllium?
Beryllium is used for: Copper and nickel alloys; Aerospace components; X-ray windows; Nuclear reactor neutron reflectors.
