Atomic NumberAtomic Number of Francium
Atomic Number of Francium is 87.
Chemical symbol for Francium is Fr. Number of protons in Francium is 87. Atomic weight of Francium is 223 u or g/mol. Melting point of Francium is 27 °C and its the boiling point is 677 °C.
» Boiling Point » Melting Point » Abundant » State at STP » Discovery YearAbout Francium
Francium is an extremely unstable and highly radioactive metal discovered in the middle of the last century by a group of French scientists and named after their homecountry. It is very toxic and has no biological importance. It does not exist on our planet in its pure form and can be extracted from thorium and radium ores. It reacts intensively with water. It has no applications and is used only for research.
Properties of Francium Element
| Atomic Number (Z) | 87 |
|---|---|
| Atomic Symbol | Fr |
| Group | 1 |
| Period | 7 |
| Atomic Weight | 223 u |
| Density | 1.87 g/cm3 |
| Melting Point (K) | 300 K |
| Melting Point (℃) | 27 °C |
| Boiling Point (K) | 950 K |
| Boiling Point (℃) | 677 °C |
| Heat Capacity | |
| Abundance | ~ 1×10−18 mg/kg |
| State at STP | Solid |
| Occurrence | Transient |
| Description | Alkali metal |
| Electronegativity (Pauling) χ | 0.7 |
| Ionization Energy (eV) | 4.0727 |
| Atomic Radius | no datapm |
| Covalent Radius | no datapm |
| Valence Electrons | 1 |
| Year of Discovery | 1939 |
| Discoverer | Perey |