<p><strong>Noun</strong></p><ul><li>A light, ductile, silver-white, metallic element that burns with a dazzling white light, used in lightweight alloys, flares, fireworks, in the manufacture of flashbulbs, optical mirrors, precision instruments, and as a zinc substitute in batteries.</li><li>Symbol: Mg</li><li>Atomic weight: 24.312</li><li>Atomic number: 12</li><li>Density: 1.74 at 20°C</li></ul>