Catenation
Catenation is the ability of carbon atoms to link with one another to form long chains, branched chains, and rings.
Practice This ConceptMain explanation
Teacher explanation
Carbon shows catenation because the carbon-carbon bond is strong and carbon is tetravalent. One carbon atom can connect to another carbon atom again and again, which creates a huge variety of structures. This is a major reason why carbon has such a large number of compounds in nature and in daily life.
Example
Butane has a chain of four carbon atoms, while cyclohexane has carbon atoms joined in a ring.
Simple analogy
Carbon can build with carbon again and again: chain, branch, ring.
Common confusion
Students sometimes think catenation means only straight chains. Carbon can also form branches and rings.
Exam tip
When a question asks why carbon compounds are so numerous, mention catenation and the strength of the carbon-carbon bond.
Answer writing and exam use
1-mark use
Write the exact meaning of catenation in one clean line.
2-mark use
Define catenation and add one example or condition.
3-mark use
Explain catenation, show the method or example, and mention the common mistake.
Practice this concept with focused MCQs
Open the concept quiz intro first, review the test details, and then start a focused MCQ set from this concept only. Instant score and answer review are live now.
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