Chemical properties - Lithium symbol, electronic configuration, density

Beryllium Description: Beryllium is a divalent element which only occurs naturally in combination with other elements in minerals. It is primarily used as a hardening agent in alloys, notably beryllium copper. In structural applications, high flexural rigidity, thermal stability, thermal conductivity and low density make beryllium a quality aerospace material for high-speed aircraft, missiles, space vehicles and communication satellites. Because of its low density and atomic mass, beryllium is relatively transparent to X-rays and other forms of ionizing radiation; therefore, it is the most common window material for X-ray equipment and in particle physics experiments. The high thermal conductivity of beryllium and beryllium oxide have led to their use in heat transport and heat sinking applications. Chemical Properties. Appearance Silvery solid or grey foil Atomic Number 4 Atomic Weight 9.01218 g/mol Block S Boiling Point 2469 °C CAS Number 7440-41-7 Class 8 Crystal Structure Hexagonal Density 1.85 g/cm3 EINECS Number 231-150-7 Electron Configuration 1s2 2s2 Group 2 Ionization Energy 899.5 kJ/mol Main Hazards Beryllium dust causes conjuctival inflammation of the eyes and dermatitis. Melting Point 1287 °C Oxidation State 2,1 PG 2 Period 2 RTECS Number DS1750000 Solubility Insoluble Symbol Be Synonyms Glucinium Beryllium manufacturers/suppliers - http://www.worldofchemicals.com/chemicals/chemical-properties/beryllium.html