Carbon dating science project
Carbon as an element was discovered by the first person to handle charcoal from fire.Thus, together with sulfur, iron, tin, lead, copper, mercury, silver, and gold, carbon was one of the small group of elements well known in the ancient world.Our editors will review what you’ve submitted and determine whether to revise the article.Join Britannica's Publishing Partner Program and our community of experts to gain a global audience for your work!Carbon (C), nonmetallic chemical element in Group 14 (IVa) of the periodic table.Although widely distributed in nature, carbon is not particularly plentiful—it makes up only about 0.025 percent of Earth’s crust—yet it forms more compounds than all the other elements combined.It was later found to occur naturally in tiny amounts on Earth and in meteorites., “to write,” reflects its property of leaving a dark mark when rubbed on a surface.
Coral and the shells of oysters and clams are primarily calcium carbonate.
Carbon is widely distributed as coal and in the organic compounds that constitute petroleum, natural gas, and all plant and animal tissue.
A natural sequence of chemical reactions called the carbon cycle—involving conversion of atmospheric carbon dioxide to carbohydrates by photosynthesis in plants, the consumption of these carbohydrates by animals and oxidation of them through metabolism to produce carbon dioxide and other products, and the return of carbon dioxide to the atmosphere—is one of the most important of all biological processes.
Carbon, either elemental or combined, is usually determined quantitatively by conversion to carbon dioxide gas, which can then be absorbed by other chemicals to give either a weighable product or a solution with acidic properties that can be titrated.diamonds were obtained from natural deposits, most significant in southern Africa but occurring also in Brazil, Venezuela, Guyana, and Siberia.
The single known source in the United States, in Arkansas, has no commercial importance; nor is India, once a source of fine diamonds, a significant present-day supplier.