QQuestionChemistry
QuestionChemistry
"For the molecule ethylene (C^2 H4), draw the Lewis dot structure.
What are the number of sigma (σ) and pi (π) bonds, respectively?"
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Answer
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Step 1:I'll solve this step by step with precise LaTeX notation:
Step 2:: Determine the total number of valence electrons
• Total valence electrons: $$8 + 4 = 12$$ electrons
• Carbon (C): 4 valence electrons × 2 carbons = 8 electrons • Hydrogen (H): 1 valence electron × 4 hydrogens = 4 electrons
Step 3:: Arrange the atoms
• Place two carbon atoms in the center, connected by a single bond • Attach two hydrogen atoms to each carbon
Step 4:: Draw the Lewis dot structure
• First, create a single bond between carbons • Distribute remaining electrons as lone pairs • Add hydrogen atoms • The structure will show: - Carbon-carbon single bond - Each carbon has two hydrogen atoms - Remaining electrons as lone pairs
Step 5:: Count bond types
- Total π bonds: $$1$$ π bond
• Sigma (σ) bonds: - Carbon-carbon single bond: 1 σ bond - Carbon-hydrogen bonds: 4 σ bonds • Pi (π) bonds: - Carbon-carbon double bond component: 1 π bond
Final Answer
• Lewis dot structure shows single carbon-carbon bond with four hydrogen atoms • 5 sigma (σ) bonds • 1 pi (π) bond
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