Magnesium is a chemical element with the symbol Mg and atomic number 12. It s a lustrous silvery white metal that's relatively soft and tarnishes slightly in air.
Phosphorous acid is a chemical substance that is used to make other phosphorus compounds.Phosphorous acid appears as a white or yellow crystalline solid (melting point 70.1 deg C) or a solution of the solid. Density 1.651 g /cm3 . Contact may severely irritate skin, eyes, and mucous membranes. Toxic