Answer :

Chemical element, metallic, symbol Mg, situated in group IIa in the periodic table, atomic number: 12, atomic weight: 24,312. Magnesium is silvery white and very light. Its relative density is 1,74 and it's density 1740 kg/m3 (0.063 lb/in3 or 108.6 lb/ft3).Th density of magnesium is 1.738 g/mL, which means the metal will sink in water, but it is still relatively light weight. Chemical Properties:Magnesium is a silvery white metal. The surface of magnesium metal is covered with a thin layer of oxide that helps protect the metal from attack by air. 
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I - Chemical Properties 
-Chemical Formula: Mg
-Flammability: Burns in air with a bright light
-Reactivity: reacts with halogens to produce halides with the presence of heat
-Alloys: Light and strong

II - Physical Properties
-Color: Silver
-Phase: Solid
-Structure: Hexagonal
-Plasticity: Malleable, can be bent.


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