8 A plot showing changes of density The most dense metal:Os catalysts:Most of transition metals and their compounds have unique catalytic properties,e.g.:Pt,Pd,Fe,Cu,V,...PdCl2,V2Os....are often used as catalyst magnetic:Most of transition metal atoms and their ions have unpaired electrons,therefore have paramagnetic properties;magnetic moment increases with increasing number of unpaired electronsA plot showing changes of density The most dense metal: Os ⚫catalysts: Most of transition metals and their compounds have unique catalytic properties, e.g.:Pt, Pd, Fe, Cu,V,…PdCl2 ,V2O5….are often used as catalyst ⚫magnetic:Most of transition metal atoms and their ions have unpaired electrons, therefore have paramagnetic properties; magnetic moment increases with increasing number of unpaired electrons