TOKNA AUR KOSNA KEHLATA HAI JUDGEMENT....TOKNA AUR KOSNA KEHLATA HAI JUDGEMENT. ATOM IS AN SMALLEST PARTICLE OF AN ELEMENT.
Answers
Answer:
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Explanation:
Primary production is the process by which alumina is smelted to pure aluminum metal. The Hall–Héroult process, simultaneously discovered in 1886 by American Charles Martin Hall and Frenchman Paul Héroult, continues as the main industrial process by which primary aluminum is made. In 1888, Martin founded the first large-scale aluminum production plant in Pittsburgh. The Reduction Company of Pittsburgh later became the Aluminum Company of America, then Alcoa.
Take-Away Facts
Aluminum does not occur in pure form
Pure forms of the metal must first be chemically refined into an alumina and then smelted into aluminum through the Hall–Héroult electrolytic reduction process.
Bauxite to aluminum reduction factors
For every 4 pounds of bauxite, 2 pounds of alumina can be produced. From every 2 pounds of alumina, 1 pound of aluminum is produced.
Energy conservation trends
Per ton of aluminum produced, electrical consumption has been reduced by 50 percent from the levels necessary 50 years ago. Electrical energy usage requirements have dropped approximately 10 percent in the past 20 years.
Why aluminum does not rust
Aluminum reacts with atmospheric oxygen. A thin layer of aluminum oxide (4 nanometers in thickness) is formed. This layer of aluminum oxide protects the metal from further oxidation, thus providing aluminum’s property of corrosion resistance.
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