Some facts about promethium are:
Promethium is an artificial element, radioactive, unstable, solid, metal, atomic number 61 , lanthanoid.
- melting point: 1 042 0C
- boiling point; 3 000 0C
- density: 7,26 g/cm3
- Pauling electronegativity: 1,13
- first ionization energy: 540 kJ/mol
- empirical atomic radius; 183 pm
- crystalline structure: double hexagonal close packed
- thermal conductivity: 17,9 W/m.K
- electrical resistivity: 0,75 microohm.m
- paramagnetic
Promethium has similar chemical properties as cerium and other lanthanoids.
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 has similar chemical properties as cerium; the oxidation state is 3+.
It is a rare earth element metal that emits beta radius.
Promethium is paramagnetic.
Promethium is not flammbale.
Promethium bromide contain promethium and bromine.
Promethium is not flammable.
Promethium has no odor.
Characteristics properties of matter are things such as:densitycolorsizeshapetemperatureThese are just few of hundreds of characteristics
Promethium is not soluble in water.
Promethium is a metal.