what is carbon? name the different allotrophic forms of carbon in both free and combined state of nature?
Answers
Answer:
carbon is the pure form of coal
Answer:
Explanation:
Carbon is the sixth element in the periodic table that has millions of compounds due to catenation and tetravalecy of the atom.
Some allotropes of carbon are:
1. Diamond: Diamond is a well known allotrope of carbon. The hardness and high dispersion of light of diamond make it useful for both industrial applications and jewelry. Diamond is the hardest known natural mineral. This makes it an excellent abrasive and makes it hold polish and luster extremely well. No known naturally occurring substance can cut (or even scratch) a diamond, except another diamond.
2. Graphite: Graphite, named by Abraham G. Werner in 1789, from the Greek graphein, "to draw/write", for its use in pencils is one of the most common allotropes of carbon. Unlike diamond, graphite is an electrical conductor. Thus, it can be used in, for instance, electrical arc lamp electrodes.
3. Graphene: A single layer of graphite is called graphene and has extraordinary electrical, thermal, and physical properties. Its applications may include replacing silicon in high-performance electronic devices.
4. Buckminsterfullerenes: Discovered in 1985 by a team of scientists from Rice University and the University of Sussex, three of whom were awarded the 1996 Nobel Prize in Chemistry. They are named for the resemblance to the geodesic structures devised by Richard Buckminster "Bucky" Fuller. Fullerenes are positively curved molecules of varying sizes composed entirely of carbon
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