Because it is made up of one type of element only. Thus it is an element, not a mixture.
Neither. Magnesium is an element.
No, magnesium is an element and therefore a pure substance.
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
To separate a heterogeneous mixture of Styrofoam beads, sand, and magnesium sulfate, start by adding water to the mixture. The magnesium sulfate will dissolve in the water, while the Styrofoam beads and sand will not. You can then filter the mixture to separate the undissolved Styrofoam and sand from the dissolved magnesium sulfate solution. Finally, evaporate the water from the magnesium sulfate solution to recover the salt.
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