Francium (Fr)

About Francium

Francium is a chemical element with the symbol Fr and atomic number 87, meaning every atom has 87 protons in its nucleus. It is classed as Alkali metal and is a solid at room temperature. Its atomic mass is about 223 atomic mass units (u).

On the periodic table, Francium sits in group 1, period 7, which determines how many electron shells it has and how it tends to react with other elements.

Uses of Francium

In daily life and industry, Francium is used for Radioactive, very rare. These uses are closely tied to the typical properties of elements in the Alkali metal category.

Electron Structure of Francium

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), Francium has 5 electron shells, with an approximate arrangement of 2, 8, 18, 32, 27 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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