Francium

Francium, Fr, is a radioactive alkali metal element, found in Group Ia of the periodic table.

Atomic Number : 87
Relative Atomic Mass : 223 approximately
Melting point : 27 degC
Boiling POint : 677 degC
Relative Density : 2.4

Discovery

Francium was discovered by Marguerite Perey in 1939AD.

Occurrence

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 are radioactive.

Properties

Francium resembles Cesium in its chemical properties.

Start of Hypertext .... Elements .... Compounds .... Index