This list includes 3 Chemical Elements that start with E, from “Einsteinium” to “Europium”. They range from a synthetic actinide used in research to naturally occurring metals used in lighting and electronics. See the A–Z index for all letters.
Chemical Elements that start with E are elements whose names begin with the letter E. Notably, Einsteinium honors Albert Einstein while Europium celebrates Europe, linking chemistry to history and culture.
Below you’ll find the table with Atomic number, Atomic weight, and Discovery year.
Atomic number: The integer shows an element’s proton count and helps you place it precisely in the periodic table.
Atomic weight: Gives the standard atomic mass with three decimals so you can compare typical isotopic masses and calculate quantities.
Discovery year: Lists the year or “Antiquity” to show when an element became known or officially discovered.
Chemical Elements that start with E
| Name | Symbol | Atomic number | Discovery year | Description |
|---|---|---|---|---|
| Einsteinium | Es | 99 | 1952–1953 | No standard atomic weight (synthetic); most stable isotope mass number 252; highly radioactive transuranium first identified in 1952 nuclear tests, used only for scientific research and making heavier elements. |
| Erbium | Er | 68 | 1843 | Standard atomic weight 167.26; naturally occurring lanthanide; silvery‑pink metal used in fiber‑optic amplifiers and lasers; discovered by C. G. Mosander in Ytterby. |
| Europium | Eu | 63 | 1901 | Standard atomic weight 151.96; naturally occurring lanthanide; soft, silvery metal notable for red phosphors in displays and security inks; isolated by Eugène‑Anatole Demarçay in 1901. |