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Define tetravalency and catenation

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And these are the phenomenon due to which carbon form long chains
TETRAVALENCY --property of an element which has 4 electrons in last shell. CATANATION--the self linking property of an element to form straight chain,branched chain and cyclic chain this property is known as catanation.
Tetravalency:- property of element to have 4 electons in its valence shell.
Catenation:-self linking property of an element to form long chains is known ad catenation.ex:-Carbon, Sulphur


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