isomers
Pronunciation
Noun
B2 Upper-intermediate
Quick answer
Compounds that share the same molecular formula but differ in how their atoms are arranged.
Usage notes
Because isomers can have quite different physical and chemical properties despite sharing a formula, structure matters as much as composition.
Test yourself
Which word fits the gap? "Butane and isobutane are _____, both made of four carbons and ten hydrogens but connected differently."
Answer: isomers
In your own words, what does "isomers" mean?
Compounds that share the same molecular formula but differ in how their atoms are arranged.
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