Fr
Francium Symbol (Fr)
Francium is element 87 of the periodic table. Copy its symbol Fr and see its atomic weight, electron configuration and physical properties.
What does Fr mean?
Fr is the chemical symbol for francium, element number 87 in the periodic table. Francium is an alkali metal in group 1, period 7. It is a solid at room temperature and was discovered in 1939.
Codes and properties
| Chemical symbol | Fr |
|---|---|
| Atomic number (Z) | 87 |
| Mass number (no standard atomic weight) | [223] |
| Group / period | 1 / 7 |
| Element category | alkali metal |
| Electron configuration | [Rn]7s¹ |
| State at 20 °C | Solid |
| Oxidation states | +1 |
| Electronegativity (Pauling) | 0.7 |
| Melting point | 300 K (26.85 °C) |
| Discovered | 1939 |
How to type Fr
- Plain text: type
Fr— element symbols are ordinary Latin letters, with the first letter capitalised and the second lowercase. - Subscripts in formulas: use Unicode subscript digits (₀₁₂₃₄₅₆₇₈₉) for formulas such as H₂O — copy them from the chemistry keyboard.
- LaTeX: write
\mathrm{Fr}in math mode, or use the mhchem package:\ce{Fr}. - HTML:
Fr; for subscripts use<sub>, e.g.H<sub>2</sub>O.
Frequently asked questions
What is the chemical symbol for francium?
The chemical symbol for francium is Fr.
What is the atomic number of francium?
Francium has atomic number 87, meaning each atom has 87 protons.
What is the electron configuration of francium?
The ground-state electron configuration of francium is [Rn]7s¹.
Related symbols
Keep exploring
Reference: Francium on PubChem (NIH)