How many sigma bonds are there in an ethene molecule?
Answer and explanation
Correct answer: D. 5
- Step 1: Write out the Lewis structure of ethene: . Each carbon atom is bonded to two hydrogen atoms via single -bonds, contributing carbon-hydrogen -bonds.
- Step 2: The carbon-carbon double bond consists of one axial -bond and one lateral -bond.
- Step 3: Summing all localized axial bonds gives sigma bonds in total.
Answer
5.
Why not the others: 7 exceeds total bonds in ethene; 4 counts only the four bonds, omitting the central -bond; 6 counts both the and bond between carbons ( total bonds).
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