Francium (Fr) — Alkali metal. Atomic number 87.
Highly radioactive metallic solid
- Atomic number: 87
- Symbol: Fr
- Atomic mass: [223] u
- Category: Alkali metal
- State: Solid
- Melting point: 26.85 °C / 300 K
- Boiling point: 676.85 °C / 950 K
- Density: 1.87 g/cm³ (20°C)
- Electron configuration: [Rn] 7s1
- Oxidation states: +1
- Electronegativity: 0.7
- Discovered by: Marguerite Perey (1939)
Common uses: Scientific research only
Biological role: No biological role.
Frequently Asked Questions about Francium
What is the atomic number of francium?
Francium has an atomic number of 87, meaning each atom contains 87 protons in its nucleus.
What is the atomic mass of francium?
The standard atomic weight of francium is [223] u (unified atomic mass units).
What category does francium belong to?
Francium is classified as a alkali metal.
What is the state of francium at room temperature?
Francium is a solid at 20 °C (68 °F).
What is the melting point of francium?
The melting point of francium is 26.85 °C / 300 K.
What is the boiling point of francium?
The boiling point of francium is 676.85 °C / 950 K.
What is the density of francium?
The density of francium is 1.87 g/cm³ (20°C).
What is the electronegativity of francium?
Francium has a Pauling electronegativity of 0.7.
What is the electron configuration of francium?
The electron configuration of francium is [Rn] 7s1.
What are the common oxidation states of francium?
Francium commonly exhibits the following oxidation states: +1.
When was francium discovered?
Francium was discovered in 1939 by Marguerite Perey.
Is francium radioactive?
Francium is a naturally occurring radioactive element; all of its isotopes are radioactive.
What is the biological role of francium?
No biological role.
What are the common uses of francium?
Francium is used for: Scientific research only.
