Most copper mined today is used to conduct electricity - mostly as wiring. It is also an excellent conductor of heat and is used in cooking utensils, heat sinks, and heat exchangers. Large amounts are also used to make alloys such as brass (copper and zinc) and bronze (copper, tin, and zinc).
Chemical Composition: Copper, Cu
Streak: Metallic copper red
Color: Copper red on a fresh surface, dull brown ..
Dolomite is a form of limestone, rich in approximately equal parts of magnesium carbonate and calcium carbonate. It is found widely throughout the world. Dolomitic limestone contains about five times as much magnesium and five eighths as much calcium as ordinary limestone. Dolomite also contains small amounts of chlorine, phosphorus, and potassium, in addition to more than 20 other trace elements.
Nutritional
Dolomite long has been used as a source of calcium and magnesium for animal feeds. Dolomite now is available in a number of dosage forms including tablets and chewable wafers, to be taken as dietary supplements. In animal models, minerals from dolomite are well absorbed. Research reveals no animal or clinical data regarding the use of dolomite as a magnesium and calcium supplement.
Dolomite, a type of limestone, provides valuable nutrients to plants and helps change the pH of the soil by raising it to match the plants' needs. It's sometimes called dolomitic lime or dolomitic limestone, and provides more nutrients than straight lime. It's often used in addition to balanced fertilizers, particularly with seeding fruit.
ead (Pb), a soft, silvery white or grayish metal in Group 14 (IVa) of the periodic table. Lead is very malleable, ductile, and dense and is a poor conductor of electricity. Known in antiquity and believed by the alchemists to be the oldest of metals, lead is highly durable and resistant to corrosion.
By the early 2000s, 88 percent of apparent U.S. lead consumption was in lead-acid batteries, which was a substantial increase from 1960 when only 30 percent of global lead consumption was in lead-acid batteries. Today, the other significant uses of lead are in ammunition, oxides in glass and ceramics, casting metals, and sheet lead.
