87Fr223
Francium
Alkali metal · element 87 · group 1, period 7
Quick facts
| Symbol | Fr |
|---|---|
| Atomic number | 87 |
| Relative atomic mass | 223 |
| Category | Alkali metal |
| Position | group 1, period 7 |
| State at 20 °C | Solid |
| Melting point | 27 °C |
| Boiling point | 677 °C |
| Density | — |
| Electronegativity | 0.7 |
| Electron configuration | [Rn] 7s1 |
About Francium
Francium has the symbol Fr and atomic number 87, which means every francium atom has 87 protons in its nucleus and, in a neutral atom, 87 electrons. At room temperature it is a solid.
Alkali metals are soft, shiny metals in group 1. They react quickly with water to make an alkaline solution and hydrogen gas, and they get more reactive going down the group.
It melts at 27 °C and boils at 677 °C.
Explore it
See where francium sits, and drag the temperature slider to watch it melt and boil, on the interactive periodic table. Practise with quizzes on OmniEx.