umm... Magnesium!
Magnesium(I) Nitride is the name of Mg3N.
Magnesium Oxide
MgCl2 is magnesium chloride.
The common name for magnesium chloride is "bitter salt" or "magnesium salt."
Magnesium Chloride is sold in crystal form for household and business use to de-ice sidewalks. Just find a solid deicer.
The common name for magnesium phosphate is "magnesium phosphate." It is often referred to by its specific forms, such as "monomagnesium phosphate" or "dimagnesium phosphate," depending on the particular salt. Magnesium phosphate is used in various applications, including as a food additive and in fertilizers.
Magnesium hydroxide is an inorganic compound with the chemical formula Mg(OH)2. As a suspension in water, it may be referred to as Milk of Magnesia. The solid mineral form of magnesium hydroxide is known as brucite.Magnesium hydroxide is common component of antacids and laxatives. Magnesium hydroxide interferes with the absorption of folic acid and iron.Magnesium hydroxide is not very soluble in water, with a Ksp of 1.5x10-11. While the solubility of magnesium hydroxide is low, all of the magnesium hydroxide that does dissolve in the water does dissociate. Since the dissociation of this small amount of dissolved magnesium hydroxide is complete, magnesium hydroxide is considered a strong base.
Epsom Salt
There is so such thing as MgBrO32. There is, however, MgO, (magnesia) MgO2, (magnesium peroxide) and BrO2. (bromine dioxide) (I'm pretty sure this should be rendered as Mg(BrO3)2. If so, the name would be magnesium bromate, though if it has any "common name" I'm not aware of what it might be.)
Magnesium 2+
The common name for MgSO4 7H2O is magnesium sulfate heptahydrate. This compound is a hydrated form of magnesium sulfate, meaning it contains water molecules within its structure. The "7H2O" in the chemical formula indicates that there are seven water molecules associated with each magnesium sulfate molecule.
Milk Of Magnesia