Symbol: Cs

Atomic Number: 55

Atomic Weight: 132.90545

Caesium (atomic number 55, symbols Cs) is a an alkali metal with a silvery-gold color and the only liquid metal from the group of elemental metals, which is liquid near or at room temperature. The only other metals in a liquid form at/ around room temperature are mercury and gallium. Caesium has chemical and physical properties that resemble those of potassium and rubidium. It is pyrophoric and very reactive, and reacts with water at temperature of 177 F (116 C). Caesium is the least electronegative of elements with stable isotopes. It is extracted mainly from the zeolite mineral pollucite, while...Read More