4 Be 9.012
Beryllium
alkaline earth metal
Properties
- Atomic number
- 4
- Atomic mass
- 9.012 u
- Category
- alkaline earth metal
- Group
- 2
- Period
- 2
- Block
- s-block
- State (room temp)
- Solid
- Outer-shell electrons
- 2
- Electronegativity
- 1.57 (Pauling)
- Density
- 1.85 g/cm³
- Melting point
- 1286.85 °C
- Boiling point
- 2468.85 °C
Electron configuration
1s² 2s²
Noble-gas shorthand: [He] 2s²
Electrons per shell: 2, 2, which is 2 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
About Beryllium
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.
- Discovered by Louis Nicolas Vauquelin
- Appearance: white-gray metallic
Beryllium: frequently asked questions
- What is Beryllium?
- Beryllium (Be) is the chemical element with atomic number 4. It is a metal: specifically an alkaline earth metal.
- What is the atomic number of Beryllium?
- Beryllium's atomic number is 4, which means every Beryllium atom has 4 protons in its nucleus.
- What is the electron configuration of Beryllium?
- The electron configuration of Beryllium is 1s2 2s2 (noble-gas shorthand: [He] 2s2). Its electrons are arranged in shells of 2, 2, with 2 in the outermost shell.
- Is Beryllium a metal or a nonmetal?
- Beryllium is a metal: specifically an alkaline earth metal.
- What group and period is Beryllium in?
- Beryllium is in group 2 and period 2 of the periodic table.
- Is Beryllium a solid, liquid, or gas?
- At room temperature, Beryllium is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.