What does the name 2-butene tell you about this hydrocarbon's molecular structure?

A. There are two carbon atoms and all single carbon bonds.

B. There are two carbon atoms and a double carbon bond.

C. There are three carbon atoms and a double carbon bond that starts on the second carbon atom.

D. There are four carbon atoms and a double carbon bond that starts on the second carbon atom.

Question

Chemistry

Annalise Morse

14 February, 17:30

What does the name 2-butene tell you about this hydrocarbon's molecular structure?

A. There are two carbon atoms and all single carbon bonds.

B. There are two carbon atoms and a double carbon bond.

C. There are three carbon atoms and a double carbon bond that starts on the second carbon atom.

D. There are four carbon atoms and a double carbon bond that starts on the second carbon atom.

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Answers (1)

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Rowan Perkins · Answer 1

Option D. There are four carbon atoms and a double bond that starts on the second carbon atom.

Methane: one carbon

Ethene: two carbons

Propene: three carbons

Butene: four carbons.

Pentene: five carbons

The suffix - ene is used for double bonds.

The number 2 - indicates the place of the carbon on which the double bond is located.