Cesium (Cs), element 55 – Learn Acer periodic table

Caesium or cesium is a chemical element with symbol Cs and atomic number 55. It is a soft, silvery-gold alkali metal with a melting point of 28 °C (82 °F), which makes it one of only five elemental metals that are liquid at or near room temperature. Caesium is an alkali metal and has physical and chemical properties similar to those of rubidium and potassium.

Symbol Cs. Atomic mass 132.905451966 u. Group 1, period 6. Electron configuration [Xe] 6s1. Electrons per shell 2, 8, 18, 18, 8, 1. State at room temperature: Solid. Melting point 28.6 °C, boiling point 670.9 °C. Discovered by Robert Bunsen.

Element data from Wikipedia, CC BY-SA 3.0.

Cesium (Cs), element 55 – Learn Acer periodic table

Cesium

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