Francium ( Alkali Metal )

• Francium was discovered by Marguerite Perey in 1939.
• Least electronegative element.
• It occurs as a result of an alpha disintegration of actinium.
• It can be produced by artificially bombarding thorium with protons.
• Francium is a heavy, unstable, radioactive metal with a maximum half-life of only 22 minutes.
• Highly radioactive.

Symbol                                 -  Fr
Atomic number                    -   87
Number of electrons            - 2, 8, 18, 32, 18, 8, 1
Electronic configuration    -  [ Rn ]7s¹

Melting point                       -  300 K
Boiling point                       -  950 K
Atomic weight                     - [ 223 ]

Atomic Structure:

Uses:

It is used for research purposes only. ( Due to its rarity and instability ).