Its a metal oxide so it'll be a base.
Acids are mainly made with a non-metal oxide, though some metal (amphoteric) oxidesare also (mainly weak) acid forming oxides
Magnesium reacts with oxygen to form magnesium oxide (MgO).
rust, iron oxide or dioxide
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Magnesium is the metal which reacts with oxygen to form magnesium oxide.
An oxygen atom can only be oxidized by some element with an equal or higher electronegativity. So, oxygen can be oxidized by fluorine (e.g., OF2) or by another oxygen atom (e.g., O2).
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Rusting is an oxidation reaction; rust (iron oxide) is formed in the presence of water and oxygen.
Iron oxide is rust. It is formed when the element iron reacts with oxygen in the water or air.
When a metal oxide reacts with an acid a slat and water are formed.
Normally, elements react with oxygen to form their oxides. The chemical formula for the oxide of silica is SiO2. It is a very common compound on earth.
A white powdery substance is formed.It is Magnesium oxide which is formed by the reaction of magnesium with oxygen.
When iron reacts with oxygen in water as well as in the atomospher iron oxide will be formed. This is nothing but the rust.