What is Cs? Important knowledge about Cs.

1. Definition of Cs

Cs, also known as Cesium, is a chemical element with the symbol Cs and atomic number 55. The atomic mass of Cs is 132.9 amu. Cs is an element of Group 1 of the periodic table, known as alkali metals. Cs molecules are made up of one Cs atom. The most common Cs ion is Cs+.

2. Properties of Cs

2.1 Physical properties: Cs in its standard state (at room temperature) is a solid with a silver-gold colour. Cs has no distinctive smell. Cs has a neutral pH when in pure form.

2.2 Chemical properties: Cs reacts vigorously with water to produce hydrogen and cesium hydroxide. Cs also reacts strongly with oxygen to form cesium oxide.

3. Common chemical reactions of Cs

Metal Reaction:
No specific examples

Acid reaction:
No specific examples

Non-metal reaction:
Cs + Cl -> CsCl
Cs + S -> Cs₂S
Cs + O -> Cs₂O
Cs + N -> Cs₃N
Cs + P -> Cs₃P

Reaction with salts:
No specific examples

4. Preparation of Cs

4.1 Laboratory preparation of Cs:
No specific examples

4.2 Industrial preparation of Cs:
Cesium is usually produced from the ore pollucite (Cs₄Al₄Si₉O₂₆.H2O), an aluminium silicate. The ore is treated with acid to produce CsAlSi₂O₆, which is then separated by a crystallization process.