copper
Copper (cupric) oxide is produced. Therefore, copper is the metal that produces a black oxide when heated.
Iron oxide - or rust.
Copper
Copper
Chemical change
Zinc oxide can be obtained by heating zinc nitrate.
barium oxide is basic oxide.As Barium is a metal so metal forms basic oxide.
When magnesium is heated in air, it forms magnesium oxide and so the total mass increases.
Copper
Iron when heated past 650 degrees Fahrenheit forms in the the presents of oxgen a black scale iron oxide.
The metal might be copper. When copper is heated, it reacts with oxygen in air forming copper oxide which is black in colour.
Chemical change
The black coating you see is a coating of copper oxide, which forms when the hot metal reacts with air. no air can reach the inside, so it does not react to form black copper oxide.
A chemical reaction happens when mercury is heated and reacts with oxygen. This reaction results in the creation of mercuric oxide, an orange or red compound.
The oxidation of a metal produces a metal oxide. For example, calcium + oxide -> calcium oxide
lead oxide
The solid formed is magnesium oxide.The gas formed is carbon dioxide.
When Hg2+ (mercury oxide) is heated it creates both Hg (liquid mercury) and O2 (oxygen gas)
metal oxide
When heated, limestone forms two different things. It forms both calcium oxide and carbon dioxide. This occurs because limestone is made up of calcium carbonate.