No, magnesium is an element and therefore a pure substance.
Neither. Magnesium is an element.
Yes, milk of magnesia is a heterogeneous mixture. It contains insoluble solid particles of magnesium hydroxide suspended in a liquid, resulting in a mixture with visibly different components that do not fully dissolve.
Magnesium hydride is a compound.
Mixture of sodium carbonate and magnesium
Dolomite limestone is a mixture of calcium carbonate and magnesium carbonate.
Element.
No, it is a compound, not a mixture. Its formula is MgO, and it contains Magnesium and Oxygen (two fairly common elements).
it is an element as it contains same kind of atoms
Neither. It's an element.
Compound
Magnesium is an element, so it's a pure substance.
Magnesium (Mg) was first obtained by English chemist Sir Humphry Davy in 1808. He produced it from the electrolysis of a mixture of magnesium oxide and mercuric oxide.