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General

• Element Identification Timeline

Relative atomic mass (145) Atomic mass (kg) 245x10-27 Density (g/cm3)   Physical State at STP Solid Melting point (°C) 1030 Boiling point (°C) 2730 Crystal Structure of solid element Close packed hexagonal Stable isotopes (9) 145Pm Half life 17.7 years

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