Which Pairs of Substances Are Isomers?

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Isomers are substances with the same molecular formula but different structural arrangements. Among the pairs discussed, butane and methylpropane are isomers, while 35Cl and 37Cl are isotopes, not isomers. Diamond and graphite are allotropes of carbon, differing in structure but not in composition. The conversation clarifies that isotopes have the same number of protons but different neutrons, while allotropes refer to different structural forms of the same element. The key takeaway is understanding the distinctions between isomers, isotopes, and allotropes.
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Homework Statement


Which of the following pairs of substances are isomers?

Homework Equations



a. 35Cl and 37Cl
b. Hexane and benzene
c. Butane and methylpropane
d. Diamond and graphite

The Attempt at a Solution


Which one is right ?
 
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What are your thoughts?

Start with the definition.
 
I think it is C?? They look like sharing a different arrangement but same formula ??
 
OK

Extra question: and how would you call forms listed in point A? D?
 
Ah...A is constitutional isomers?? And D is three-dimensional lattice??
 
Nope, take a step back and forget about isomers.

What do you call two different atoms with same number of protons but different numbers of neutrons?

When an element can exist is different forms, how do you call them?
 
I this they are isotopes . Do you mean Allot-ropes for that element?
 
Yes.
 
Thank you so much ;)
 

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