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• Element Identification Timeline

Relative atomic mass (223) Atomic mass (kg) 370x10-27 Density (g/cm3) unknown Physical State at STP Solid Melting point (°C) 27 Boiling point (°C) 677 Crystal Structure of solid element Body centred cubic Radioactive isotopes (4) 223Fr Half life 21.8 minutes

STP = standard temperature and pressure. Usually considered as room temperature and pressure.