Fe-Fe203-Fe(NO3)3-Fe(OH)3-Fe2O3-Fe

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Iron (Fe) is a chemical element with the atomic number 26. It is a metal that is commonly found in various minerals and ores.

Fe2O3, also known as iron (III) oxide or ferric oxide, is a compound made up of iron and oxygen. It is commonly found in nature as the mineral hematite and is used in various industrial applications.

Fe(NO3)3 is iron (III) nitrate, a chemical compound made up of iron and nitrate ions. It is a strong oxidizing agent and is commonly used in laboratory settings.

Fe(OH)3 is iron (III) hydroxide, a chemical compound made up of iron, oxygen, and hydrogen. It is a common compound found in nature as the mineral goethite.

In summary, the compounds Fe2O3, Fe(NO3)3, and Fe(OH)3 are all forms of iron that have different chemical compositions and properties. Iron plays a crucial role in many industrial processes and biological functions.