Describe oxide compounds formed by elements of first transition series.
The elements of d block are called as transition elements.
The first transition series start from scandium and ends at zinc. A variety of metal oxides of forst transition series are found
Monooxide - all the first transition series elements form mono oxide except Cr(I)
Polyoxometallates -for example Cr2O7,
Other oxide- for example MnO4, Fe2O3 ,TiO2,