Are MgO and CaO metallic oxides or non-metallic oxides?
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Answer:
Metallic Oxides – Metallic oxides are made of metal and oxygen. These are generally found in nature as minerals. These are formed by oxidation of metals. Examples of metallic oxide – CaO, MgO, Fe3O4, BaO, ZnO etc.
MgO and CaO are metallic oxides.
Metallic Oxides – Metallic oxides are made of metal and oxygen. These are generally found in nature as minerals. These are formed by oxidation of metals. Examples of metallic oxide – CaO, MgO, Fe3O4, BaO, ZnO etc.
Metalic Oxides:
Metal oxides are crystalline solids that contain a metal cation and an oxide anion. They typically react with water to form bases or with acids to form salts.
Metal oxides are very common commodities, widely applied, and have many different varieties. For example, zinc oxide sintered together with other metal oxide additives have been made into nonlinear resistors, which are called Varistors for surge suppressing function. The suppressing function has been applied for switching and for protection of random voltage protections. Iron oxide and other metal oxides are used in thermite reactions, and this has been applied in many ways, including welding in spaceship repairs. Iron oxides are also the raw material for all magnets and magnetic materials used for computer disks and recording tapes.
Non Metallic Oxides:
All nonmetals form covalent oxides with oxygen, which react with water to form acids or with bases to form salts. Most nonmetal oxides are acidic and form oxyacids, which in turn yield hydronium ions (H3O+) in aqueous solution. There are two general statements that describe the behaviour of acidic oxides. First, oxides such as sulfur trioxide (SO3) and dinitrogen pentoxide (N2O5), in which the nonmetal exhibits one of its common oxidation numbers, are known as acid anhydrides. These oxides react with water to form oxyacids, with no change in the oxidation number of the nonmetal; for example,
N2O5 + H2O → 2HNO3.