Use element 54 for a precise periodic-table reference. In ordinary prose, xenon is usually more direct.
Use element 54 for a precise periodic-table reference. In ordinary prose, xenon is usually more direct.
X is written instead of Xe, and the phrase is sometimes confused with krypton, iodine, or a whole class of noble gases.
The phrase combines element with the periodic-table number 54. The element named by that number is xenon, named in 1898 by William Ramsay and Morris Travers from Greek xenos, meaning stranger or foreigner.