In the methane structure, each of the four valence electrons pairs up with the sole electron of hydrogen and shows:
Correct answer: B. AB₄ type with no lone pair
- A. AB₄ type with two lone pairs
- B. AB₄ type with no lone pair
- C. AB₄ with no bond pair
- D. AB₄ with one lone pair
Explanation
In a methane molecule, the four valence electrons of carbon are each paired with one electron of hydrogen. It has four bond pairs and no lone pair. The molecule shape is of AB4 type.
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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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