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 Do you know do Zirconium  EmptyThu Dec 19, 2013 11:21 am by 

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Poll

So, why'd you pick chemistry?

 Do you know do Zirconium  Vote_lcap0% Do you know do Zirconium  Vote_rcap 0% [ 0 ]
 Do you know do Zirconium  Vote_lcap25% Do you know do Zirconium  Vote_rcap 25% [ 1 ]
 Do you know do Zirconium  Vote_lcap25% Do you know do Zirconium  Vote_rcap 25% [ 1 ]
 Do you know do Zirconium  Vote_lcap50% Do you know do Zirconium  Vote_rcap 50% [ 2 ]
 Do you know do Zirconium  Vote_lcap0% Do you know do Zirconium  Vote_rcap 0% [ 0 ]

Total Votes : 4


Do you know do Zirconium

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 Do you know do Zirconium  Empty Do you know do Zirconium

Post  yinhua Tue Nov 30, 2010 11:20 pm


Zirconium is a chemical element with the symbol Zr and atomic number 40. Its atomic mass is 91.224. It is a lustrous, grey-white, strong transition metal that resembles titanium. Zirconium is used as an alloying agent for its strong resistance to corrosion. It is never found as a native metal; it is obtained mainly from the mineral zircon, which can be purified with chlorine. Zirconium was first isolated in an impure form in 1824 by Jöns Jakob Berzelius.
Zirconium has no known biological role. Zirconium forms both inorganic and organometallic compounds such as zirconium dioxide and zirconocene dichloride, respectively. There are five naturally occurring isotopes, three of which are stable. Short-term exposure to zirconium powder causes minor irritation, and inhalation of zirconium compounds can cause skin and lung granulomas.


yinhua

Posts : 57
Join date : 2010-05-20

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