It is estimated that the Vickers hardness of promethium is 617,8 MPa.
The hardness of promethium is 63 kg/mm2 (approx. 92 Brinell).
Mercury's hardness is listed as '0' on interpretations of the Mohs scale.
After the Pauling electronegativity (1,13) promethium is a reactive metal but the chemistry of Pm is only superficially known.The valence of ions in solution is +3. Promethium compounds known: halides, oxides, nitrates, sulfates, hydroxides etc.
Promethium bromide contain promethium and bromine.
Yes, Promethium is a radioactive element that is paramagnetic, meaning it is weakly attracted to magnetic fields.
Promethium is not flammable.
Promethium salts, oxides, and halides are common compounds of promethium. Promethium oxide (Pm2O3) and promethium chloride (PmCl3) are among the compounds that can be formed with promethium.
Yes. Promethium is a solid.
Promethium is not flammable.
Promethium is a metal.
Promethium has 61 protons.
Promethium is not soluble in water.