Here you’ll find 1 Chemical Elements that start with X that begin with X, organized from “Xenon” to “Xenon”. Xenon is a colorless noble gas used in lighting, medical imaging, and spacecraft ion thrusters. See the A–Z index for other letters.
Chemical Elements that start with X are elements whose names begin with X; only “Xenon” fits this category. Xenon was discovered in 1898 and later found notable uses in lighting and anesthesia.
Below you’ll find the table with Atomic number, Element, Atomic weight, Discovery year
Atomic number: Shows the element’s proton count so you can see its position and compare elemental order.
Element: Gives the element’s name so you can quickly identify which substance the table row describes.
Atomic weight: Lists the standard atomic weight with three decimals so you can compare relative masses for calculations or reference.
Discovery year: Shows the year or period when the element was discovered so you can place it in historical context.
Chemical Elements that start with X
| Name | Symbol | Atomic Number | Standard Atomic Weight (u) | Description |
|---|---|---|---|---|
| Xenon | Xe | 54 | 131.293 u | Discovered 1898 (Ramsay & Travers); a naturally occurring noble gas in trace atmospheric amounts. Used in lighting, ion propulsion, and as an anesthetic; notable for heavy inert atoms and multiple stable isotopes (IUPAC/NIST). |