Francium (Fr) in the periodic table — PeriodicTable

Francium (Fr) in the periodic tableFrancium is element 87, an alkali metal of the s block, in group 1, period 7. Its ground-state configuration is [Rn] 7s1, and it usually shows the oxidation states 0, 1.It was discovered in 1939, by Perey.Name origin: Francia, the New Latin name for France. Blank rows are columns the sheet does not measure for this element.

Property

Value

Unit

Atomic weight

223

Da

Electronegativity

0.7

First ionisation energy

380

kJ/mol

Van der Waals radius

348

pm

Melting point

300

K

Boiling point

950

K

Density

1.87

g/cm³

Abundance

0

mg/kg

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