Example of Metallic Oxides

Metal oxides are the chemical compounds made up of a metal and the element oxygen. These can form when the ambient air strikes the surface metallic. This reaction is easier when the metal has had contact with water. Water, also known as "the universal solvent", is capable of detaching external metallic particles and these oxidize.

A metal like iron is used to form solid structures. When its rust begins to form, it is said to be subjected to a oxidation reaction. Its oxide is a reddish-orange powder, which will no longer serve to give the material stability and rigidity. The phenomenon in which the material deteriorates and loses usefulness due to the oxidation reaction is called corrosion.

Formulas of metal oxides

First of all, to write the formula of all metal oxide the metal symbol is placed first, and then the oxygen symbol. It gets attention to valences, both metal and oxygen. These Are exchanged and they put as subscripts of opposites.

For example:

• Zinc (Zn) has a valence of +2. Oxygen (O) has valence -2. Write the symbol for metal and then for oxygen: Zn-O. The two numbers of the valences are exchanged. Zn left
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  ₂OR₂. As the valences are equal, the formula can be left without numbers: ZnO.
• Aluminum (Al) has valence +3. Oxygen (O) has valence -2. The symbol for metal is written and then that of oxygen: Al-O. The two numbers of the valences are exchanged. It remains at₂OR₃.
• One of the valences of chromium (Cr) is +3. Oxygen (O) has valence -2. Write the symbol for metal and then for oxygen: Cr-O. The two numbers of the valences are exchanged. Cr remains₂OR₃.

Nomenclature of metal oxides

Metal oxides are easy to name; this only depends on the valences or oxidation states that the metal atoms handle. For this reason, the types of nomenclature are classified into three different:

• Single valence metal oxides
• Metal oxides with two valences
• Metal oxides with various valences

Single valence metal oxides

When the metal handles only one valence, such as alkali metals, alkaline earth metals and others, only the following format is used for the name of its oxides:

Rust + of + Metal

For example:

• Zinc handles valence +2. Its oxide, ZnO, is named: Zinc Oxide.
• Sodium handles valence +1. Its oxide Na₂Or it is named: Sodium Oxide.
• Potassium handles valence +1. Its oxide K₂Or it is named: Potassium Oxide.
• Magnesium handles valence +2. Its oxide MgO is named: Magnesium Oxide.
• Aluminum handles valence +3. Its oxide Al₂OR₃ is named: Aluminum Oxide.

Metal oxides with two valences

When the metal handles two valences, the suffixes "bear", for the lower valence, and "ico", for the higher valence, can be used. The following formats are followed:

Oxide + Metal- "bear"

Oxide + Metal- “ico”

For example:

• Iron handles two valences: +2 and +3. Your first oxide FeO (or Fe₂OR₂) is named Ferrous oxide. Its major oxide Fe₂OR₃ is named Ferric oxide.
• Mercury handles two valences: +1 and +2. Your first oxide Hg₂Or is it named Mercuric Oxide. Its major oxide HgO (or Hg₂OR₂) is named Mercuric Oxide.
• Cobalt handles two valences: +2 and +3. Its first oxide CoO (or Co₂OR₂) is named Cobaltous Oxide. Its major oxide Co₂OR₃ is named Cobalt oxide.

Metal oxides with various valences

When a metal handles several valences, a numerical prefix is ​​added to the word "oxide", such as "di" (two), "tri" (three), "tetra" (four), "penta" (five). And the following format is used:

(prefix) -Metal + oxide

For example:

• Manganese handles several valences. When it binds to oxygen to form the formula MnO₂ (which is Mn₂OR₄ simplified), it is called Manganese Dioxide.
• Vanadium handles various valences. When it binds to oxygen to form the formula V₂OR₅, It is called Vanadium pentoxide.
• Chromium is one of the elements that most valences handle. When it binds to oxygen to form the formula CrO₃ (which is Cr₂OR₆ simplified), it is called Chromium trioxide.

Examples of metal oxides

• Lithium Oxide (Li₂OR)
• Sodium Oxide (Na₂OR)
• Potassium oxide (K₂OR)
• Rubidium oxide (Rb₂OR)
• Cesium oxide (Cs₂OR)
• Magnesium Oxide (MgO)
• Calcium Oxide (CaO)
• Strontium Oxide (SrO)
• Barium Oxide (BaO)
• Ferrous Oxide (FeO)
• Ferric Oxide (Fe₂OR₃)
• Zinc Oxide (ZnO)
• Manganese Dioxide (MnO₂)
• Cadmium Oxide (CdO)
• Mercuric Oxide (Hg₂OR)
• Mercuric Oxide (HgO)
• Cuprous Oxide (Cu₂OR)
• Cupric Oxide (CuO)
• Silver Oxide (Ag₂OR)
• Nickel Oxide (NiO)
• Palladium Oxide (PdO)
• Platinum Oxide (Pt₂OR₄)
• Vanadium pentoxide (V₂OR₅)
• Cobaltous Oxide (CoO)
• Cobalt Oxide (Co₂OR₃)
• Osmium Tetraoxide (OsO₄)
• Dichrome trioxide (Cr₂OR₃)
• Chromium trioxide (CrO₃)
• Tungsten Oxide (WO₃)
• Titanium Dioxide (TiO₂)