Copper is a pliable metal with high thermal and electrical conductivity capabilities. It can be identified on the periodic table of elements as Cu and as atomic number 29. Copper and its alloys have been used for thousands of years for various purposes.Know More
Copper is a reddish colored metal that polishes to a bright shine, of which HowStuffWorks says, makes it one of the most useful metals, like iron. While it does not rust, exposure to moisture results in a green patina. Its uses range from jewelry making to plumbing.
Copper is second only to silver in its ability to conduct electricity. This makes it a valuable metal in the electronics industry, where it finds its greatest use.
Zinc alloys with copper are bronze, and tin alloys are brass. In addition, some copper alloys have importance in the biomedical field as they are antimicrobial.
Copper forms compounds with many other elements. These compounds are poisonous to invertebrates and thus used as algaecides and pesticides. While overexposure is sometimes toxic to plants and higher animal life, copper compounds are also essential nutrients. In humans, the liver is 0.00003 percent copper.
While miners often remove copper from the Earth in the form of minerals, it sometime appears in the elemental form. About.com reports, that North America, South America and Africa all have ore deposits. Refineries use smelting, leaching and electrolysis of ores to prepare commercially available copper, some as pure as 99.999+ percent.Learn more about Acids & Bases
Copper is important because it plays a role in green energy, technology and the economy. Copper is used to help create hybrid vehicles, mobile phones and tablet computers.Full Answer >
Physically, acids have a sour taste, are soluble in water, turn blue litmus paper red, are corrosive, have pH values less than 7 and conduct electricity. These physical properties of acids are a byproduct of the acids' chemical properties. Acids can be solutions or pure substances and can be either solid, liquid or gaseous in nature.Full Answer >
Some of the properties of acids are that they conduct electricity when they are dissolved in water, liberate hydrogen when they react with active metals and, when combined with a base, will produce a salt and a neutralized base. Acids also have a pH which is less than 7 in an aqueous solution, and will change the color of blue litmus paper to red. In an operational sense, acids increase the concentration of H+ ions when they are dissolved in water.Full Answer >
Acids usually exhibit a sour taste, an ability to change litmus paper from blue to red, react with bases to yield a salt with water, and react with some metals to produce hydrogen gas. Examples of common household acids are lemon juice, vinegar and citric acid.Full Answer >