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Cu (Copper )

Keterangan

       Copper is a very interesting element. It is one of the transition elements that actually uses electrons from one of the inner orbitals in chemical reactions. In addition, it has more than one oxidation state. Like many of the transition elements, copper has a colored ion. Copper typically forms a bluish green solution. Copper (Cu) has two valences Cu I (cuprous) has one valence electron and Cu II (cupric) has two valence electrons. Copper was one of the earliest known metals, having reportedly been mined for over 5000 years. In nature it has two isotopes, 63 (69.09%), which has 29 electrons and protons and 34 neutrons, and 65 (30.91%), which has 29 electrons and protons and 36 neutrons. Brass and bronze are alloys of copper.

Nama lain (trademark, branding etc.)

Cuprum, Měd´, Bakar, Cuivre, Kupfer - e, Rame, Kobber, Cobre

 

Spesifikasi Produk

Overview of Copper Atomic Number 29 Group 11 Period 4 Series Transition Metals Relative Atomic Mass (12C=12.000)  63.546 Boiling Point:  2840K 2567°C 4653°F Melting Point:  1357.75K 1084.6°C 1984.3°F Density/kg m-3  8960 (293K) Ground State Electron Configuration  [Ar]3d104s1 Electron Affinity(M-M-)/kJ mol-1  -118.3 Discoverer Known to ancient civilization Discovery Location Unknown Discovery Year Unknown Name Origin: Latin: cyprium (island of Cyprus famed for its copper mines).

Aplikasi

     The greatest percentage of copper used is in electrical equipment such as wiring and motors. Brass and bronze are both copper alloys and are extensively used. All American coins are now copper alloys, and gun metals also contain copper.    Copper sulfate is used widely as an agricultural poison and as an algicide in water purification. Copper compounds such as Fehling's solution are used in chemical tests for sugar detection.

Bahan Baku

copper is usually supplied in a fine-grained polycrystalline form, which has greater strength than monocrystalline forms.

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