Information valid for Be-9 unless otherwise noted

Beryllium

Basic Information

Symbol: Be
Atomic Number: 4
Mass: 9.012182
Melting Point: 1278.0 C
Boiling Point: 2970.0 C
Number of Protons/Electrons: 4
Number of Neutrons: 5
Classification: Alkaline Earth
Crystal Structure: Hexagonal
Density @ 293 K: 1.8477 g/cm³
Color: gray

Atomic Structure

Number of Energy Levels: 2 First Energy Level: 2 Second Energy Level: 2

Isotopes

Facts

Date of Discovery: 1798
Discoverer: Fredrich Wohler
Name Origin: From the mineral beryl
Uses: spacecraft, missiles, aircraft
Obtained From: beryl, chrysoberyl