salt
The oxide formed in gold is neither an acid nor a base. Gold oxide (Au2O3) is considered to be amphoteric, which means it can exhibit characteristics of both an acid and a base depending on the reaction it undergoes. It can react with both acids and bases to form different compounds.
Magnesium oxide react with water and magnesium hydroxide is formed.
These are called amphoteric. They can react and neutralise both acids and alkalis. Such examples include aluminum oxide, zinc oxide and beryllium oxide.
A basic solution
Insoluble metal oxide + strong acid ---> salt + water
something else
It is nonmetallic because it is a gas, but it can react with a metal to create something called an oxide. so... metal + oxygen --> Metaloxide.
covalent
Yes. aluminum will react with some acids. But after being exposed to air it forms an oxide layer that many acids can't penetrate.
metal oxide
Yes, and beryllium oxide is formed.
The oxide formed in gold is neither an acid nor a base. Gold oxide (Au2O3) is considered to be amphoteric, which means it can exhibit characteristics of both an acid and a base depending on the reaction it undergoes. It can react with both acids and bases to form different compounds.
Nitrogen Oxide
Aluminium oxide, Al2O3, alumina, is an amphoteric oxide. It is not very reactive, but does react with acids and bases. It dissolves in acids. With bases it can forms aluminates containing polyatomic anions containing aluminium. ions.
Magnesium oxide react with water and magnesium hydroxide is formed.
These are called amphoteric. They can react and neutralise both acids and alkalis. Such examples include aluminum oxide, zinc oxide and beryllium oxide.
A basic solution