Physics

About Lithium Definition Lithium is a soft, silvery metallic element of the alkali group that occurs in small amounts in some minerals. It is the…

Aluminium Definition Aluminium is a silvery-white, ductile metallic element, the most abundant in the earth’s crust but found only in combination, chiefly in bauxite. Aluminium…

About Bronze Definition Bronze is a yellow or brown alloy of copper and tin, sometimes with small amounts of other metals such as lead or…

Ceramic Definition Ceramic are any of various hard, brittle, heat- and corrosion-resistant materials made typically of metallic elements combined with oxygen or with carbon, nitrogen,…

Malachite Definition Malachite is a bright-green monoclinic mineral occurring as a mass of crystals (an aggregate) with smooth or botryoidal (grape-shaped) surfaces. It is often…

About Azurite Definition Azurite is a soft stone, named for its deep “azure blue” color. It is a copper carbonate mineral found in the upper…

Copper Sulfide Definition Copper sulfide is a crystalline solid used as a semiconductor and in photo optic applications. It is the black, bluish black, or…

Copper Definition Copper is a reddish-brown, ductile, malleable metallic element that is an excellent conductor of heat and electricity. It is the 29th element on…

About Silver Definition Silver is a soft, shiny, white metallic element that is found in many ores, especially together with copper, lead, and zinc. It…

Ethylene Oxide Definition Ethylene oxide is a colorless, odorless, gaseous, toxic, ring compound, C2H4O, usually obtained by the oxidation of ethylene: used chiefly in the…

Thionyl Chloride Definition Thionyl chloride is a moderately volatile colorless liquid with an unpleasant acrid odor. Boiling point 79°C. A lachrymator, highly corrosive and toxic.…

Zinc Chloride Definition Zinc chloride (ZnCl2) is a white, water-soluble crystalline compound used as a wood preservative, as a soldering flux, and for a variety…