Beryllium, atomic number 4, atomic weight 9.012182, is the lightest alkaline earth metal element
white. Beryl and emerald were chemicalized by French chemist Walkerland in 1798
found during analysis. In 1828 the German chemist Willer and the French chemist Bissy
Pure beryllium is obtained by reducing molten beryllium chloride with metallic potassium, respectively. Its English name is Wei
Le named. The content of beryllium in the earth’s crust is 0.001%, and the main mineral is beryl
, beryllium and chrysoberyl. Natural beryllium has three isotopes: beryllium 7, beryllium 8,
Beryllium 10.
Beryllium is a steel gray metal; melting point 1283°C, boiling point 2970°C, density 1.85 g/cm³, beryllium ion radius 0.31 angstroms, much smaller than other metals.
Beryllium is chemically active and can form a dense surface oxide protective layer, even if
Beryllium is also stable in air at red heat. Beryllium can react with dilute acid, also
Soluble in strong alkali, showing amphoteric. Oxides and halides of beryllium have obvious
Obviously covalent, beryllium compounds are easily decomposed in water, and beryllium can also form polymerization
and covalent compounds with significant thermal stability.
Metal beryllium is mainly used as a neutron moderator in nuclear reactors. Beryllium copper alloy is used for
Manufacturing non-sparking tools, such as critical moving parts of aero-engines,
Precision instruments, etc. Beryllium due to its light weight, high elastic modulus and good thermal stability,
Has become a compelling aircraft and missile structural material.