87 Alkali Alkaline Earth

Francium

RIS 0.001

Velocity —

Rank#99

Co-citedAt

Physical properties

Category Alkali Metal

Block s-block

State Solid

Config [Rn] 7s1

Electronegativity 0.7

Density 1.87 g/cm³

Melting 300.0 K

Boiling 950.0 K

Ionization 380.0 kJ/mol

Oxidation +1

Discovered 1939 · Marguerite Perey

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Francium

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Research intensity over time

Francium's associations