Francium (Fr)

A fascinating alkali metal element.

Francium is element 87 on the periodic table.

Element properties

Atomic number

87

Symbol

Fr

Atomic mass

223 u

Category

Alkali Metal

Period

7

Group

1

Block

s

State

Solid

Electron configuration

[Rn] 7s1

Electronegativity (Pauling)

0.7

Density

1.87 g/cm³

Melting point

27 °C

Boiling point

677 °C