This list includes 4 Chemical Elements that start with F, from “Fermium” to “Francium”. They range from the reactive nonmetal fluorine to heavy synthetic actinides like fermium. Common uses include toothpaste and disinfectants, plus roles in nuclear research and advanced materials. See the full A–Z index: Complete Chemical Elements A–Z
Chemical Elements that start with F are members of the periodic table whose names begin with the letter F. Notably, fluorine’s isolation in the 1800s transformed several industries and safety practices.
Below you’ll find the table with Element, Atomic number, Standard atomic weight, and Discovery year.
Element: The element name lets you identify each entry quickly and match it to periodic table tiles or class notes.
Atomic number: Shows the element’s proton count and lets you sort elements by position and chemical family quickly.
Standard atomic weight: Provides the typical atomic mass with three decimals so you can compare elemental masses and calculate simple molar values.
Discovery year: Gives the year or period when each element was discovered, helping you place discoveries in historical context.
Chemical Elements that start with F
| Name | Symbol | Atomic number | Standard atomic weight (u) | Description |
|---|---|---|---|---|
| Fluorine | F | 9 | 18.99 u | Isolated 1886; natural, highly reactive pale-yellow gas; key to fluorides (toothpaste) and industrial fluorination (IUPAC). |
| Francium | Fr | 87 | — | Discovered 1939; natural but extremely rare and highly radioactive; no standard atomic weight—longest-lived isotope 223 (half-life ≈22 min); studied only in research (IUPAC). |
| Fermium | Fm | 100 | — | Discovered 1952; synthetic transuranic named for Enrico Fermi; no standard atomic weight—longest-lived isotope 257 (half-life ≈100.5 days); used in research (IUPAC). |
| Flerovium | Fl | 114 | — | First synthesized 1998; synthetic superheavy named for Georgy Flerov; no standard atomic weight—longest-lived isotope 289 (half-life ≈2.6 s); for nuclear research (IUPAC). |