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Caesium is the spelling recommended by the International Union of Pure and Applied Chemistry (IUPAC). [10] The American Chemical Society (ACS) has used the spelling cesium since 1921, [11] [12] following Webster's New International Dictionary. The element was named after the Latin word caesius, meaning "bluish grey". [13]
sulphur vs sulfur: sulphur is the prevalent spelling outside North America; however, in scientific literature sulfur should be used, as recommended by IUPAC. (see Sulfur#Spelling and etymology) caesium vs cesium: cesium is the prevalent spelling throughout North America; however, in scientific literature caesium should be used, as recommended ...
Seriously though, cesium may be more common (one reason being that Americans have more scientific influence that any other nation, so cesium would naturally occur more frequently - even in non-English speaking nations), but the fact is that it is recommended by the appropriate international body to spell it caesium (maybe due to to historical ...
"Majority of English speakers clearly recognize Cesium better than Caesium" - possibly, but as a geochemist for 45 years I spell it caesium, as does my wife (an organometallic researcher) and people I work with from a number of English-speaking countries (Britain, South Africa, Australia) as well as English journals (eg Nature) and European ...
The base unit of time in the International System of Units (SI), and by extension most of the Western world, is the second, defined as about 9 billion oscillations of the caesium atom. The exact modern SI definition is "[The second] is defined by taking the fixed numerical value of the cesium frequency, Δν Cs, the unperturbed ground-state ...
Caesium fluoride has the halite structure, which means that the Cs + and F − pack in a cubic closest packed array as do Na + and Cl − in sodium chloride. [3] Unlike sodium chloride, caesium fluoride's anion is smaller than its cation, so it is the anion size that sterically inhibits larger coordination numbers than six under normally ...
The caesium chloride structure adopts a primitive cubic lattice with a two-atom basis, where both atoms have eightfold coordination. The chloride atoms lie upon the lattice points at the corners of the cube, while the caesium atoms lie in the holes in the center of the cubes; an alternative and exactly equivalent 'setting' has the caesium ions at the corners and the chloride ion in the center.
Caesium oxide (IUPAC name), or cesium oxide, describes inorganic compounds composed of caesium and oxygen. Several binary (containing only Cs and O) oxides of caesium are known. [1] [2] Caesium oxide may refer to: Caesium suboxides (Cs 7 O, Cs 4 O, and Cs 11 O 3) Caesium monoxide (Cs 2 O, the most common oxide) Caesium peroxide (Cs 2 O 2 ...