Copper+Caroline+and+Bingyan

__**Copper**__  //**by** Caroline Casey and Bingyan Cao//   media type="custom" key="12063415"

__**Copper at a Glance (Chemical and Physical Properties):**__ Coppers atomic number is 29 and is one of three “money metals” on the periodic table. It has an extremely high melting point of 1083 degrees Celsius. Although Copper is not naturally very shiny, when polished it reflects a bright red-orange.

Copper is not a very reactive metal, but has a tendency to turn green over time when in contact with air this process is called oxidation. The green coating is called //Patina// and its purpose is to prevent the metal from corroding any further. Other than being malleable and ductile, copper is a great conductor, which is why it is used so often in heating and electricity.

__**Chemical and Physical Properties**__
__**Use **__ Copper is believed to have been discovered by the egyptians (3900 B.C.E.) Today, we use copper for many different purposes, we are able to use this metal for such a vast variety of purposes due to its specific chemical and physical properties, such as malleability and ductility, and conductivity.
 * Atomic number = 29
 * Atomic weight = 63.546
 * Melting Point = 1083 degrees Celsius
 * Boiling Point = 25262 degrees Celsius
 * Density =.00894 grams per cubic centimeter
 * Phase at Room Temperature = solid
 * Element Classification = metal
 * Period Number = 4
 * Group Number= 11
 * Block = d



Copper is used for water pipes and plumbing, currency, electric wires, heating, construction, in alloys such as bronze or brass, protective coatings like in nickel and zinc, utensils and even in animal feeds and fertilizers as a micronutrient. Copper is a very good conductor of electricity and heat which is a result of coppers low hardness.(Copper's low hardness, as well as it's ductility and malleability is attributed to its weak bonds.) It is therefore substituted for aluminum in many circuits and machines. Copper is easily combined with other elements, creating many different alloys, these alloys are used often in the jewelry buisness. Combining copper with other metals alters its characteristics, for example it changes the melting point of the original metal. Copper is also water resistant, which is why it is used for plumbing and roofing.


 * Comparison to similar elements** --- need to rewrite in own words as well as find other more reliable websites (other then wikipedia) to back it up

Copper, silver and gold are in [|group 11] of the periodic table, and they share certain attributes: they have one s-orbital electron on top of a filled d- [|electron shell] and are characterized by high ductility and electrical conductivity. -- aluminum as well

together with [|osmium] (bluish), and [|gold] (yellow), copper is one of only three elemental metals with a natural color other than gray or silver. [|[7] ] The characteristic color of copper results from the electronic transitions between the filled 3d and half-empty 4s atomic shells – the energy difference between these shells is such that it corresponds to orange light. The same mechanism accounts for the yellow color of gold. [|[2] ]
 * Surprising and interesting fact**

Unfortunately, Copper is a mineral, meaning it is relatively rare. -- price it higher?
 * Pricing**


 * Unique selling proposition**

Sources (We need to put these in MLA format) Words [] [] [|http://en.wikipedia.org/wiki/Copper#Characteristics] Picture [|Andrew Dalton] in [|News] < [] > //Copper ETFs Fall on Growth, Debt Concerns by // [|Tom Lydon] // < // [] > < [] > []