Nature of Transition Metals Oxides:

The oxides of  transition metals will be acidic , basic or amphoteric  as camparative with its oxidation state. The follow following trends.

Trends (1): The higher oxidation state of the central metal atom , the more covalent character  and oxide will be more acidic in nature.

Trends (2): The Lower oxidation state of the central metal atom , the more ionic character and oxide will be more basic in nature.

Trends (3): The moderate oxidation of central metal atom oxide will be amphoteric in Nature .

Oxidation State	Nature of Oxides
+1 , +2 , +3	Basic ,Except Cr2O3
+4	Amphoteric e.g. MnO2
+5, +6, +7	Acidic,V2O5,CrO3,MoO3,Mn2O7,OsO4

Example of oxides of (Mn):

Oxides	Oxidation state	Nature
MnO	+2	Basic
MnO2	+4	Amphoteric
Mn2O7	+7	Acidic

Example of oxides of (Cr):

Oxides	Oxidation state	Nature
CrO	+2	Basic
Cr2O3	+3	Amphoteric
CrO3	+6	Acidic

Related Questions:

(1) What is the structure and structural characteristic of dichromate kon (Cr2O7)-2?

(2) What is the structure and structural characteristic of dichlorine heptaoxide (Cl2O7)-2?

Oxides:

(1) Normal Oxides:

(2) Sesqui Oxides:

(3) Mixed Oxides:

(4) Peroxides:

(5) Super Oxides:

(6) Suboxides:

(7) Perovskites:

(8) Spinel Oxides:

(9) Cage like Oxide:

Others oxides

(1) Crystal lattice Structure of Oxides:

(2) Corundum (Al2O3) type Structure:

(3) What are the normal spinel structures?

(4) What are the inverse spinel structures?

(5) Rutile (TiO2) type Structure:

(6) Pervoskite (ABO3) type structure: