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VISUAL CHEMISTRY
FRANCIUM
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General
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PROPERTIES |
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Relative atomic mass |
(223) |
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Atomic mass (kg) |
370x10-27 |
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Density (g/cm3) |
unknown |
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Physical State at STP |
Solid |
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Melting point (°C) |
27 |
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Boiling point (°C) |
677 |
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Crystal
Structure of solid element |
Body centred cubic |
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Radioactive isotopes (4) |
 223Fr
Half life 21.8 minutes |
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STP =
standard temperature and pressure. Usually
considered as room temperature and
pressure. |
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