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Replacing Jokes

Geology Puns
What do geologists call a benzene ring with iron atoms replacing the carbon atoms? A ferrous wheel.
Chemistry Puns
What do chemists call a benzene ring with iron atoms replacing the carbon atoms?
A ferrous wheel.
Rock Puns
What do you call a benzene ring where the iron atoms replacing all of the carbon atoms? A ferrous wheel.
What do you call a benzene ring where the iron atoms replacing all of the carbon atoms?
A ferrous wheel.