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| | Copper - Wikipedia, the free encyclopedia |
 | | Copper doorknobs are used by hospitals to reduce the transfer of disease, and Legionnaire's Disease is suppressed by copper tubing in air-conditioning systems. |
 | | Copper (I) compounds : copper(I) chloride, copper(I) bromide, copper(I) iodide, copper(I) oxide. |
 | | Copper (II) compounds : copper(II) carbonate, copper(II) chloride, copper(II) hydroxide, copper(II) nitrate, copper(II) oxide, copper(II) sulfate, copper(II) sulfide. |
| en.wikipedia.org /wiki/Copper (2714 words) |
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