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Dear 1923 Buffalo Nickel....What Are You?
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<p>[QUOTE="MacSpecial7, post: 5165902, member: 116253"]Nickel.....The world’s 24th most abundant element is a transition metal, meaning it occupies the middle of the periodic table of elements which indicates it has chemical properties that enable it to form multiple chemical compounds. Pure nickel is hard yet ductile and pliable and is used as a strengthening component in metal alloys.</p><p>It is also Ubiquitous in soil and can be found at higher concentrations in a number of mineral ores.</p><p>Nickel has been a favored component of coins because it is bright, takes a fine polish and because it is lighter than copper, silver or other metals used in coin currency.</p><p>Nickel does not easily oxidize or rust, therefore it was adapted as an electroplating material. Electroplating is a process in which metal ions in a chemical solution are attracted to a solid metal electrode. As the ions bind to the surface of the metal they form a uniform, thin coating.</p><p>Electroplating a metal surface with nickel can form a layer that protects against corrosion.</p><p><br /></p><p><br /></p><p>Freshly formed, copper is a beautiful rosy-pink color. Before long, however, it changes to a darker russet-brown. Under certain circumstances, it may turn red, black or blue-green.</p><p>The lowest oxide level of copper is cuprous oxide, or cuprite. Its color is pink. Barely noticeable at first, a penny becomes darker over time due to the tarnish layer thickening, as well as the continued oxidation to the black cupric oxide, tenorite.</p><p>Exposure to moisture in the presence of dissolved acidic substances, such as carbon dioxide and the polluting substances found in acid rain, tarnished copper turns green. Among these acid substances are the oxides of sulfur and the oxides of nitrogen. Reacting with moisture, they form dilute solutions of strong acids.</p><p>These acids interacting with the tarnished copper produce predominantly three minerals responsible for the blue-green to gray-green patina.......[/QUOTE]</p><p><br /></p>
[QUOTE="MacSpecial7, post: 5165902, member: 116253"]Nickel.....The world’s 24th most abundant element is a transition metal, meaning it occupies the middle of the periodic table of elements which indicates it has chemical properties that enable it to form multiple chemical compounds. Pure nickel is hard yet ductile and pliable and is used as a strengthening component in metal alloys. It is also Ubiquitous in soil and can be found at higher concentrations in a number of mineral ores. Nickel has been a favored component of coins because it is bright, takes a fine polish and because it is lighter than copper, silver or other metals used in coin currency. Nickel does not easily oxidize or rust, therefore it was adapted as an electroplating material. Electroplating is a process in which metal ions in a chemical solution are attracted to a solid metal electrode. As the ions bind to the surface of the metal they form a uniform, thin coating. Electroplating a metal surface with nickel can form a layer that protects against corrosion. Freshly formed, copper is a beautiful rosy-pink color. Before long, however, it changes to a darker russet-brown. Under certain circumstances, it may turn red, black or blue-green. The lowest oxide level of copper is cuprous oxide, or cuprite. Its color is pink. Barely noticeable at first, a penny becomes darker over time due to the tarnish layer thickening, as well as the continued oxidation to the black cupric oxide, tenorite. Exposure to moisture in the presence of dissolved acidic substances, such as carbon dioxide and the polluting substances found in acid rain, tarnished copper turns green. Among these acid substances are the oxides of sulfur and the oxides of nitrogen. Reacting with moisture, they form dilute solutions of strong acids. These acids interacting with the tarnished copper produce predominantly three minerals responsible for the blue-green to gray-green patina.......[/QUOTE]
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