Metal 1
Metal 1 : (Techn) An electropositive element, usually a solid with high strength and plastic properties, that is a good conductor of heat and electricity, reflects light, has luster, and forms basic hydroxides and oxides. Note: Metallic sodium, potassium, and lithium burn vigorously in air and react violently with water. Magnesium will burn and cannot be extinguished by carbon dioxide, vaporizing liquid extinguishers, or many of the common chemical extinguishing agents. Burning magnesium combines with atmospheric air to form magnesium nitride. Molten magnesium reacts with water, liberating heat and hydrogen gas, which can lead to an explosion hazard. Powdered iron, titanium, zirconium, and steel wool (esp if oiled) present combustion and explosion hazards. Magnesium and aluminum are extremely dangerous in powdered form. Powdered aluminum and iron oxide form a high-temperature combustible material called thermite. Copper can burn in a chlorine atmosphere. Other combustible metals and dust-explosion hazards are germanium, hafnium, plutonium, and uranium
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