brief about carbon
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➡Carbon is a chemical element with symbol C and atomic number 6.
➡It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds.
➡It belongs to group 14 of the periodic table.
➡Atomic mass: 12.0107 u
➡Atomic number: 6
Electron configuration: [He] 2s22p2
➡Isotopes of carbon are atomic nuclei that contain six protons plus a number of neutrons (varying from 2 to 16).
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☆ Carbon is non-metal whose atomic no. is 6 and atomic mass is approx 12.
☆ Usually all non-metals are insulator of electricity but an allotroph of carbon that is graphite is good conductor of electricity.
☆ It's valency is 4 (Tetravalency) and have self - linking property(catenation) due to which it forms a large number of compounds.
☆ Carbon always forms covalent Bond.
i) In free state :- Like Diamond, graphite and Buckminsterfullerene.
ii) In combined state :- Like Carbon dioxide gas in air , fossil fuel , wood, cotton , Fats proteins , carbonates(like marble , limestone and chalk).
There are mainly three allotrophes of carbon :-
i) It is a colourless transparent substance having extraordinary brilliance.
●diamonds are used in cutting instruments like glass cutters , marble cutters and in rock drilling equipment.
● Diamonds are used for making jewellery.
ii) It is greyish-black Opaque substance.
● It is used as dry lubricant.
● It is used in making electrodes in dry cells.
● It is used in making 'pencil leads' .
iii)
it contains clusters of 60 carbon atoms join together to form sperical molecules.
It is still under investigation.
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