Carbon dating used


It does not react with sulfuric acid, hydrochloric acid, chlorine or any alkalis.At elevated temperatures, carbon reacts with oxygen to form carbon oxides, and will rob oxygen from metal oxides to leave the elemental metal.Although it forms an extraordinary variety of compounds, most forms of carbon are comparatively unreactive under normal conditions.

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Thus, irrespective of its allotropic form, carbon remains solid at higher temperatures than the highest melting point metals such as tungsten or rhenium.

Although thermodynamically prone to oxidation, carbon resists oxidation more effectively than elements such as iron and copper that are weaker reducing agents at room temperature.

It is present as a powder, and is the main constituent of substances such as charcoal, lampblack (soot) and activated carbon.

At normal pressures, carbon takes the form of graphite, in which each atom is bonded trigonally to three others in a plane composed of fused hexagonal rings, just like those in aromatic hydrocarbons.

"coal") is a chemical element with symbol C and atomic number 6.