Carbon-14, a radioactive isotope of carbon with a half-life of 5,730 years, is used to find the age of formerly living things through a process known as radiocarbon dating. Scientists know that a small amount of naturally occurring carbon is carbon-14.
Although carbon-14 decays into nitrogen-14 through beta decay, the amount of carbon-14 in the environment remains constant because new carbon-14 is always being created in the upper atmosphere by cosmic rays.
Atomic Number: 6 Atomic Weight: 12.0107 Melting Point: 3823 K (3550°C or 6422°F) Boiling Point: 4098 K (3825°C or 6917°F) Density: 2.2670 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Non-metal Period Number: 2 Group Number: 14 Group Name: none What's in a name? Three naturally occurring allotropes of carbon are known to exist: amorphous, graphite and diamond.
Naturally occurring graphite occurs in two forms, alpha and beta.These two forms have identical physical properties but different crystal structures. History and Uses: Carbon, the sixth most abundant element in the universe, has been known since ancient times.Amorphous carbon is formed when a material containing carbon is burned without enough oxygen for it to burn completely.A single buckyball consists of 60 or 70 carbon atoms (C) linked together in a structure that looks like a soccer ball.
They can trap other atoms within their framework, appear to be capable of withstanding great pressures and have magnetic and superconductive properties.
Graphite, one of the softest materials known, is a form of carbon that is primarily used as a lubricant.
Although it does occur naturally, most commercial graphite is produced by treating petroleum coke, a black tar residue remaining after the refinement of crude oil, in an oxygen-free oven.
Diamond, the third naturally occurring form of carbon, is one of the hardest substances known.
Although naturally occurring diamond is typically used for jewelry, most commercial quality diamonds are artificially produced.
The carbon-14 within that organism is no longer replaced and the percentage of carbon-14 begins to decrease as it decays.