An elementary substance, not metallic in its nature, which is present in all organic compounds. Atomic weight 11.97. Symbol C. it is combustible, and forms the base of lampblack and charcoal, and enters largely into mineral coals. In its pure crystallized state it constitutes the diamond, the hardest of known substances, occuring in monometric crystals like the octahedron, etc. Another modification is graphite, or blacklead, and in this it is soft, and occurs in hexagonal prisms or tables. When united with oxygen it forms carbon dioxide, commonly called carbonic acid, or carbonic oxide, according to the proportions of the oxygen; when united with hydrogen, it forms various compounds called hydrocarbons. Compare Diamond, and Graphite.
A carbon rod or pencil used in an arc lamp; also, a plate or piece of carbon used as one of the elements of a voltaic battery.
A diamond is composed of pure carbon. Carbon, when subjected to tremendous amounts of heat and pressure, crystallizes. Many diamonds do not completely crystallize. As a diamond crystal forms, some Carbon may not be crystallized resulting in birthmarks known as inclusions. Inclusions aid jewelers in identifying diamonds and make every diamond unique. The best way to identify your diamond is know what its inclusions look like, unless of course you are fortunate enough to own a flawless diamond, which has perfect crystal structure and no inclusions.
a chemical element found in coal, graphite, and diamonds........ back
a chemical element that is found in all plants and animals, as well as in some nonliving things like rocks, coal, and petroleum
The central element of life. Carbon has the ability to form bonds with up to four other elements or molecules at the same time.
The element that provides the backbone for all organic polymers. Graphite is a more ordered form of carbon. Diamond is the densest crystalline form of carbon.
Inclusions in diamonds, usually black or other colors.
Major element essential to the growth and vitality of African Violets. Sometimes called a free element. Carbon is absorbed from the air, primarily in the form of carbon dioxide. Through the process of photosynthesis, carbon combines with hydrogen and oxygen to form plant carbohydrates.
Element. The principal combustible constituent of all fuels.
An element. Atoms of carbon are the building blocks of living cells.
An element forming a large number of compounds, many of which have important uses. Diamond and graphite are amongst the main forms of carbon. Coals are elemental carbon mixed with varying amounts of carbon compounds; coke and charcoal are nearly pure carbon. All organic compounds, such as proteins, carbohydrates, and fats, contain carbon, and all plant and animal cells consist of carbon compounds and their polymers.
Carbon (C) occurs in nature as the sixth most abundant element in the universe and the 19th element in order of mass in the Earth's crust. Carbon reduces many metals from their oxides when heated with the latter, and small amounts of it greatly affect the properties of iron. Carbides, which are carbon compounds with one or more metallic elements, can form during welding when carbon is present. By limiting the concentration of carbon, carbide formation is avoided, preventing intergranular corrosion in the weld heat affected zones.
Spots are the name often used for black spots in diamonds. This is misleading since these spots are certainly not coal, but usually transparent diamond crystals within the main diamond.
adsorption A process by which contaminants are removed from groundwater or surface water when the water is forced through tanks containing activated carbon, a material that attracts the contaminants.
Symbol: C. Atomic mass: 12.011. Atomic number: 6. A common element found in many compounds, including diamond, graphite, carbon dioxide, and many organic compounds.
Diamonds are formed from this black substance. Occasionally you are able to a small black speck of carbon in a diamond.
A black nonmetallic element found native or as a constituent of coal, petroleum, and asphalt. The addition of carbon to iron makes steel.
Element occurring as diamond and as graphite. Carbon reduces many metals from their oxides when heated with the latter, and small amounts of it greatly affect the properties of iron. Though classed as a nonmetallic, metallurgically, like boron, it is treated as a metal.
A natural element occurring in many inorganic and all organic compounds.
A nonmetallic element that is the principal hardening element present in all steels. In general, increased carbon content reduces ductility but increases tensile strength and the ability of the steel to harden when cooled rapidly from elevated temperatures. At temperatures below 700° C, carbon is present in steel as iron carbide, cementite, Fe C. The cementite forms lamellae, which “reinforces” the iron. This explains why a steel with a high-carbon content is harder than one with a low-carbon content. Generally, 0.05 to 0.25% is considered low-carbon steel, 0.25 to 0.5% is medium-carbon and 0.5 to 0.9% is high-carbon. The mixture of ferrite and cementite in a grain is called pearlite. Ductility and weldability decrease with increasing carbon content. Austenite can dissolve up to 2% carbon. When cooled in water or oil, carbon stays in a supersaturated solution of martensite.
The mineral that transforms iron into steel. High-carbon steel results when 0.5 percent or more carbon is present.
An essential alloying addition in steel. As the carbon content of steel increases so does the strength and hardness. To optimise the ductility and toughness for a given strength level the steel would be quenched and tempered. The majority of carbon would then be in the form of fine carbides. Carbon besides increasing the strength and hardness also increases hardenability (q.v.). In general, the higher the carbon content, the greater the care required in welding. (See Carbon Equivalent.)
The basic element in all organic compounds.
The twelfth element in the Periodic Table.
Carbon is the most important alloying element which is essential for the formation of cementite, pearlite, spheriodite, bainite, and iron-carbon martensite. Compared to steels with similar microstructures, strength, hardness, hardenability, and ductile-to-brittle transition temperature are increased with increasing carbon content up to approximately .60%. Toughness and ductility of pearlitic steels are decreased with increasing carbon content.
A naturally occurring chemical element, with the symbol C. Vital for our existence due to its unique chemical characteristics. Diamond and Graphite are a form of Carbon.
the base of all hydrocarbons; capable of combining with hydrogen in almost numberless hydrocarbon compounds. The carbon content of a hydrocarbon determines, to a degree, the hydrocarbon's burning characteristics and qualities.
a chemical element found in coal, graphite, and diamonds..... return
The element upon which all organic molecules are based. Carbon has an atomic weight of 12.00, and occurs elementally in these forms: diamond, graphite and amorphous carbon such as coal or carbon black.
Element present in most clays which gives a black colour unless it is burnt out during firing. (See box p.151) Pottery can be deliberately blackened by firing in a smoky fire, which impregnates the surface with carbon (soot).
an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds
a chemical element occurring in nature as diamond and graphite and forming a constituent of coal, petroleum, and limestone.
a chemical element found in all living things.
Basic atom that when crystallized ( through natural or human processes) forms a diamond
A non-metal element found in all living things.
A nonmetallic element, found free in nature in three allotropic forms: amorphous, graphite, and diamond.
Atomic number is 6; element is in group 14 (or IVa) of periodic table. Carbon content of a hydrocarbon determines, to a degree, hydrocarbon's burning characteristics and qualities.
the element that is one of the building blocks of all life.
An abundant, naturally occurring element. Often used in place of the word graphite. Graphite is a form of the element carbon. There are four forms of carbon.
Sometimes called charcoal, filter carbon is a manufactured product that is made by heating a substance like coal, nut shells, or bone to very high temperatures in the absence of oxygen. The resulting product is shot full of nooks and crannies that have a magnet-like attraction for chemicals. Filter carbon works by the process of adsorption--catching and holding contaminants on its surface. It is the preferred treatment for almost all chemical water contaminants and is a great enhancer of taste and odor. For chlorine removal, nothing equals it, although KDF, discussed below, works well in some cases.
The principal hardening element in steel. The higher the carbon content, the harder the metal and the more temper it will take, thus giving longer "memory".
a non-metallic element that is the basis for all life
the basic element which makes up living organisms
element number 6; a substance used to remove odor and color from water by adsorption.
The raw material of which diamonds are made. Occasionally a diamond will contain tiny pockets of carbon that can be seen as black spots within the stone.
A key element in fossil fuels, whose molecular weight is equivalent to less than one-third that of carbon dioxide.
A fundamental chemical element. It is important to distinguish between carbon and carbon dioxide.
Today's spars are made of carbon fiber which is a stronger material that is lighter and stiffer than fiberglass. Also know as graphite spar.
A chemical substance, which exists in its pure form as diamond or graphite, and is part of coal and oil, as well as being contained in all plants and animals.
Diamonds are composed entirely, or almost entirely, of carbon.
An abundant element of natural occurrence, often used instead of the word graphite. Graphite is a type of the element carbon.
The principal non-metallic element which when combined with iron in controlled amounts below 2.0% forms the materials known as carbon steels.
An atom and primary constituent of hydrocarbon fuels. Carbon is routinely left as a black deposit left on engine parts such as pistons, rings, and valves by the combustion of fuel.
A nonmetallic element found in all living things. Carbon is part of all organic compounds and, in combined form, of many inorganic substances. Diamonds, graphite, and fullerenes are pure forms of carbon.
An element present in all steels. Increasing the carbon content increases hardness.
A naturally occurring abundant nonmetallic element that occurs in many inorganic and all organic and compounds.
Carbon is an essential element in steel, it is added in specific amounts to control the hardness and strength of the material. In general, increased carbon content reduces ductility but increases tensile strength and the ability of the steel to harden when cooled rapidly from elevated temperatu re s. With an increase in the amount of carbon, the hardness and tensile strength of the steel also increase (which slows as the level of carbon rises). An increase in carbon thusly causes a decrease in both ductility and weldability.
An abundant nonmetallic element (atomic number 6) that is present in many inorganic compounds and in all organic ones.
An element with an atomic number of 6 and an atomic mass of a bit more than 12. Carbon is important to biology because of carbon's strong tendency to form pure covalent bonds. Thus carbon atoms provide the skeletal framework of the molecules found in living things. Naturally pure carbon is found in three forms; graphite, buckminsterfullerine and its variants, and diamonds. It might be some some interest to diamond purchasers to note that diamonds eventually will decay into graphite.
The 7th element of the periodic table of elements.
Element, symbol C. Carbon compounds are the basis of all living matter.
An inclusion in a diamond that appears black to the unaided eye.
In its pure form carbon exists as a diamond or graphite; atomic number 6; atomic weight 12.011; atomic symbol C. This element combines with other elements.
Often found in knife blades; it takes an edge easier than most other steels, but is highly susceptible to corrosion if not properly maintained.
Carbon (IPA: ) is a chemical element that has the symbol C and atomic number 6. An abundant nonmetallic, tetravalent element, carbon has several allotropic forms.