Fermium (Fm)

About Fermium

Fermium is a chemical element with the symbol Fm and atomic number 100, meaning every atom has 100 protons in its nucleus. It is classed as Actinide and is a solid at room temperature. Its atomic mass is about 257 atomic mass units (u).

On the periodic table, Fermium sits in group 14, period 7 (actinide series), which determines how many electron shells it has and how it tends to react with other elements.

Uses of Fermium

In daily life and industry, Fermium is used for Research. These uses are closely tied to the typical properties of elements in the Actinide category.

Electron Structure of Fermium

Using a simplified electron shell model (at most 2 electrons in the first shell, 8 in the second, 18 in the third, and so on), Fermium has 6 electron shells, with an approximate arrangement of 2, 8, 18, 32, 32, 8 electrons from the innermost shell to the outermost. This is a simplified learning model, not the full electron configuration that accounts for the s, p, d and f subshells.

Explore Other Elements

Want to see another element or try the element symbol quiz? Go back to the Interactive Periodic Table to explore all 118 chemical elements.

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