The simplest way to tell if something is copper is by its appearance, which is a unique reddish tone before oxidation. Its color turns green when oxidized. Copper also has several other notable properties, such as a high level of thermal and electrical conductivity, as well as specific strengths against a variety of stresses. Copper is extremely common in human use, both in piping in its pure form and in alloys such as brass and bronze in such forms as doorknobs and sculptures.
If an object's appearance does not show that it is copper, or if someone suspects that it is just a copper plating or paint, there are other ways to check. The least destructive ways are to weigh it, or to check its electrical conductivity. Copper weighs about 0.3 ounces per cubic centimeter, so if one have an easy way to calculate the volume of material, he will be able to predict a copper object's weight. The electrical standard potential of copper is either 0.522 volts or 0.345 volts, depending on the type. This may be misleading, however, because a thick enough coating of copper will conduct electricity by itself. Pure copper is relatively soft and is easily scratched with common steel tools.Learn More
Cracking is the chemical process of breaking down large hydrocarbon molecules into useful products. For example, cracking breaks down the hydrocarbon molecules of decane into propene and heptane.Full Answer >
Glucose is the only monosaccharide present in maltose. Each unit of maltose is composed of two units of glucose. Its isomer, isomaltose, is also composed solely of glucose.Full Answer >
The element that has the largest atomic radius is cesium. It has an atomic radius of 298 pm, or picometers. An alkali metal, cesium is so active that it instantly explodes if dropped into cold water. It's also one of the few metals that becomes a liquid at close to room temperature. Its melting point is 83.19 degrees Fahrenheit.Full Answer >
Hydrogen peroxide, also known as dihydrogen dioxide, has a pH level anywhere from 1 to 5, depending on the solution's concentration and how it is produced. Many hydrogen peroxide solutions contain stabilizers that affect the product's pH. The solution's pH level can be increased or decreased depending on the exact stabilizer that is used.Full Answer >