Caesium (IUPAC spelling; [9] also spelled cesium in American English) is a chemical element; it has symbol Cs and atomic number 55. It is a soft, silvery-golden alkali metal with a melting point of 28.5 °C (83.3 °F; 301.6 K), which makes it one of only five elemental metals that are liquid at or near room temperature .

Cesium is a chemical element with symbol Cs and atomic number 55. Classified as a n alkali metal, Cesium is a solid at room temperature. [Xe]6s 1. J.C. Slater, J Chem Phys, 1964, 41 (10), 3199-3205. DOI:10.1063/1.1725697.

2025年3月13日 · cesium (Cs), chemical element of Group 1 (also called Group Ia) of the periodic table, the alkali metal group, and the first element to be discovered spectroscopically (1860), by German scientists Robert Bunsen and Gustav Kirchhoff, who named it for the unique blue lines of its spectrum (Latin caesius, “sky-blue”).

Where the element is most commonly found in nature, and how it is sourced commercially. The symbol reflects the use of the element in highly accurate atomic clocks. Caesium is a soft, gold-coloured metal that is quickly attacked by air and reacts explosively in water. The most common use for caesium compounds is as a drilling fluid.

Cesium is the 55th element in the periodic table and has a symbol of Cs and atomic number of 55. It has an atomic weight of 132.90545 and a mass number of 133. Cesium has fifty-five protons and seventy-eight neutrons in its nucleus, and fifty-five electrons in six shells.

Cesium (pronounced as SEE-zee-em), sometimes spelled as caesium, is a highly reactive metal when exposed to air and water. Denoted by the chemical symbol Cs, it belongs to the family of alkali metals [1]. It has one naturally occurring isotope, Cs …

Get the facts about element Caesium (Cs) [55] from the periodic table. Find physical data, electron configuration, chemical properties, aggregation states, isotope data (including decay trees) as well as some historic information.

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.

2020年11月21日 · Caesium is a chemical element with atomic number 55 which means there are 55 protons and 55 electrons in the atomic structure. The chemical symbol for Caesium is Cs. Caesium is a soft, silvery-gold alkali metal with a melting point of 28.5 °C, which makes it one of only five elemental metals that are liquid at or near room temperature.

Caesium or cesium is a chemical element or alkali metal of the periodic table with the symbol Cs and atomic number 55. It is a golden yellow, soft, and low melting metal of group 1 of the periodic table. In 1860, caesium element was discovered by German chemist Robert Bunsen and physicist Gustav Kirchhoff through flame spectroscopy analysis.