Reactions of Magnesium

Water: When exposed to steam, magnesium changes from magnesium to magnesium oxide and hydrogen.

When exposed to cold water, the reaction is a bit different. The reaction does not stop because the magnesium hydroxide gets insoluble in water.

Oxygen: When exposed to oxygen, magnesium turns into magnesium oxide.

Hydrogen: When exposed to hydrogen, magnesium turns into magnesium hydride.

Nitrogen: When reacted with nitrogen, magnesium turns into magnesium nitride.

Halogens: When reacted with a halogen, magnesium is very reactive. An example will be with chloride. When reacted with chloride, the product is magnesium(II) chloride.

Acids: When reacted with acids, magnesium dissolves and forms solutions that have both the Mg(II) ion and hydrogen gas.