The article focuses on beryllium, the smallest metal atom which is protected by a thin layer of beryllium oxide (BeO) from concentrated oxidizing acids. It states that beryllium offers thermal, mechanical, and electrical usages including its use in beryllium-copper alloys which serve in gyroscopes or magnetic resonance imaging devices, and in doping semiconductors through molecular beam epitaxy. It adds that in the form of dust, beryllium can be toxic when inhaled that can cause berylliosis.