Symbol
Be
Atomic Number
4
Atomic Mass
9.0122
Protons
4
Neutrons
5
Electrons
4
Type
Alkaline Earth Metal
Isotopes
Beryllium-9
Discovery Year
1798
Discovered By
Louis-Nicolas Vauquelin
Group
2
Period
2
Boiling Point
4476°F
Melting Point
2349°F
Electron Configuration
[He] 2s²
Density (g/cm³)
1.85
Crystal Structure
Hexagonal
Magnetism
Diamagnetic
Abundance in Earth's Crust
0.00019%
Phase at Room Temperature
Solid