Caesium is the spelling recommended by the International Union of Pure and Applied Chemistry (IUPAC). [9] The American Chemical Society (ACS) has used the spelling cesium since 1921, [10][11] following Webster's New International Dictionary. The element was named after the Latin word caesius, meaning "bluish grey". [12] In medieval and early modern writings caesius was spelled with the ...
Caesium is found in the minerals pollucite and lepidolite. Pollucite is found in great quantities at Bernic Lake,Manitoba, Canada and in the USA, and from this source the element can be prepared.
Caesium is one of the most versatile elements on the periodic table, with uses ranging from defining how the world measures time to treating cancer and powering spacecraft. Its unique physical properties, including the lowest ionization energy of any stable element and strong photoemissive behavior, make it irreplaceable in several high-precision technologies. Defining the Second in Global ...
Cesium or caesium is an alkali metal with atomic number 55 and element symbol Cs. Cesium (or caesium) is a soft, shiny, pale gold metal with the chemical symbol Cs and atomic number 55. It is the most electropositive and least electronegative element using the Pauling scale. Cesium melts just above room temperature (28.5 °C or 83.3 °F), meaning you could theoretically melt it in your hand ...
Caesium, gallium, and mercury are the only three metals that are liquid at or around room temperature. Caesium reacts explosively with cold water, and reacts with ice at temperatures above -116°C. Caesium hydroxide is a strong base and attacks glass. Cartoon by Nick D Kim ([Science and Ink], used by permission).