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Rekha 21:
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| Element Category
| Transition
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! colspan="2" |
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| colspan="2" | [[file:Electron shell 029 Copper.svg|thumb|center|200px|Copper ke electron shell]]
Rekha 30:
[[file:Cu,29.jpg|thumb|Some small pieces of copper in a tube. New copper is a pink color. The color changes to the more orange colour that many people have seen soon when new copper is left in air.]]
'''Copper''' ek [[chemical element]]
== References ==
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