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Transcript of zinc
(Zn) Colette Toal 5/7/10
Sammi Kim 6/8
There is some controversy over whether or not zinc is considered to be a transition metal. It is generally considered to be in this family, but some scientists say that zinc is not actually a true transition metal because its melting and boiling points are too low.
Atomic Number: 30
Atomic Mass: 65.39
Classification: Metal Element Facts • Zinc was first recognized as a distinct element 1374.
•Zinc compounds have been used for at least 2,500 years in the production of brass
• Metallic zinc was first produced in India sometime in the 1400s by heating the mineral calamine (ZnCO3) with wool.
•Zinc was rediscovered by Andreas Sigismund Marggraf in 1746 by heating calamine with charcoal.
•Today, most zinc is produced through the electrolysis of aqueous zinc sulfate (ZnSO4).
History Physical Properties •bluish-white
•brittle at ordinary temperatures
•malleable at 100 to 150 degrees Celcius.
•is a fair conductor of electricity
•Zinc is a fairly soft metal. Its hardness is 2.5 on the Mohs scale
•exhibits superplasticity -- In materials science, superplasticity is a state in which solid crystalline material is deformed well beyond its usual breaking point. It is the phenomenon, exhibited by certain metals and alloys usually at high temperatures, of stretching to extreme lengths without breaking.
•density - 7.140 g/mL, which means the metal will sink in water and is relatively heavy. Zinc Used Today... Zinc is used to make a variety of alloys. Zinc oxide is used in paints. Zinc chloride is used as a deodorant, and wood preservative. Zinc is also used in roofing and gutters. Zinc is also a micronutrient for humans, animals, and plants. The variety of alloys include: brass, bronze, nickel silver, German silver, and typewriter metal. Did you know these
super fun facts? Zinc is essential to the growth of humans, animals, and plants. Studies show that zinc-deficient animals require 50% more food to attain a healthy, normal weight.
After aluminum and copper, zinc is the third most used nonferrous element of which the United States consumes more than a million tons a year.
The average American will use about 730 pounds of zinc in his/her lifetime.
The United States penny is 98% zinc, with a copper coating.
Zinc is essential for healthy skin. It is a natural element that is found in our bodies, food, products, and earth. Chemical Properties •Zinc is a fairly active element.
•It dissolves in both acids and alkalis.
• does NOT react with oxygen in dry air.
•burns in air at high red heat with evolution of white clouds of the oxide. Oil tank sacrificial anodes.
Andreas Sigismund Marggraf Zinc is a silvery, gray color. Zinc BBs for BB Guns. Zinc candlestick.
Zinc Penny Zinc Pills. Ordinary zinc-plated bolt and nut.
Pure zinc, and a penny to show difference in color.