Isotope dating old objects

The numerical value for these properties varies depending on where the graphite originates.

The amorphous forms of carbon, like other non-crystalline materials, do not have clear-cut melting and boiling points.

One of the most common forms of carbon is charcoal.

Charcoal is made by heating wood in the absence of air so it does not catch fire.

More than ten million compounds of carbon are known.

No other element, except for hydrogen, occurs in even a fraction of that number of compounds.

If one could look at a molecule of almost any plastic, for example, a long chain of carbon atoms attached to each other (and to other atoms as well) would be evident. (See accompanying diagrams.) Buckyballs are a recently discovered form of pure carbon.In 1787, four French chemists wrote a book outlining a method for naming chemical substances.The name they used, carbone, is based on the earlier Latin term for charcoal, charbon. Allotropes are forms of an element with different physical and chemical properties.French physicist René Antoine Ferchault Reaumur (1683-1757) believed carbon might be an element.He studied the differences between wrought iron, cast iron, and steel.

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