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Atomic Number	87

Atomic Symbol	Fr

Atomic Weight	[223 amu]

Group	Alkali, 1

Form	Solid

Melting Point	27 °C (80.6 °F, 300.15 °K)

Heat of Fusion	2 kJ/mol (approx.)

Heat of Vaporization	65 kJ/mol (approx.)

Electronegativity (on Pauling scale	0.7

Ground State Electron Configuration	5d¹⁰ 6s² 6p⁶ 6f¹

Oxidation State(s)	+1

Selected Radioisotopes	²²³Fr

Discovered by	Perey, 1939