Periodic Table of the Elements: Francium

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Periodic Table of the Elements: Francium
Atomic Number:87
Atomic Symbol:Fr
 Franciumfrancium
[from France], radioactive chemical element; symbol Fr; at. no. 87; mass no. of most stable isotope 223; m.p. about 27°C; (estimated); b.p. 677°C; (estimated); sp. gr. unknown; valence +1.
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Atomic Weight:(223)
Electron Configuration:2 · 8 · 18 32 · 18 8 · 1
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