Francium, Fr, is a radioactive alkali metal element, found in
Group Ia of the
- Atomic Number : 87
- Relative Atomic Mass : 223 approximately
- Melting point : 27 degC
- Boiling POint : 677 degC
- Relative Density : 2.4
Francium was discovered by Marguerite Perey in 1939AD.
Francium is an unstable element that occurs in ultra trace amounts
in rocks, and less than 30 grams exists on Earth.
Francium is found in uranium and thorium ores. All 22 known isotopes
Francium resembles Cesium in its chemical properties.
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