Isomer
/ˈaɪsəmər/
Definition 1 of 1
Pro Tip 1/3Visualize Molecules
Imagining the spatial arrangement of atoms can help grasp different isomer structures. 
Picture the isomers of pentane like rearranged puzzle pieces with the same atoms.
Pro Tip 2/3Beware Ambiguity
Isomers share chemical formulas but have unique properties, so specify the type when possible. 
When discussing isomers, clarify whether you mean a structural isomer or a stereoisomer.
Pro Tip 3/3Chemistry-Specific
The term isomer is primarily used in chemistry and may confuse if used in other contexts. 
In chemistry class, we learned that glucose and fructose are isomers.