The number of sigma electrons in ethene are:
Correct answer: B. 10
- A. 5
- B. 10
- C. 4
- D. 8
Explanation
Ethene (C2H4) contains 10 sigma (σ) electrons. In the molecular structure of ethene, each carbon (C) atom is connected to three other atoms: two hydrogen (H) atoms and one neighboring carbon atom. The carbon-carbon double bond in ethene consists of one sigma bond (σ) and one pi bond (π). The sigma bond forms from the head-on overlap of sp2 hybrid orbitals from each carbon atom, and the pi bond results from the side-to-side overlap of p orbitals.
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Chemical bonding explains molecular shape through VSEPR theory and distinguishes sigma bonds from pi bonds. Questions involve hybridization, bond angles, dipole moment and bond energy, including how electron-pair repulsion determines geometry and how bond polarity differs from the overall polarity of a molecule.
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