Based on the Lewis dot structure for methane (CH_4), how many lone pairs of electrons are present on the central carbon atom?

• A. 4
• B. 1
• C. 0
• D. 2

Answer: (C)

Verified step by step guidance

1. Recall that a Lewis dot structure represents the valence electrons of atoms as dots around the atomic symbols, showing bonding and lone pairs.
2. Identify the central atom in methane (CH_4), which is carbon (C), and note that carbon has 4 valence electrons.
3. Recognize that in methane, carbon forms four single covalent bonds with four hydrogen atoms, sharing one electron with each hydrogen.
4. Since all four valence electrons of carbon are involved in bonding, there are no remaining electrons to form lone pairs on the carbon atom.
5. Conclude that the number of lone pairs on the central carbon atom in methane is zero.