Number of vertices in an icosahedral closo-borane is ____.
Answer
Answer (as printed): 12
The options are missing from the source scan for this question, so there is nothing here for this letter to point at. The letter is what the book printed.
Explanation
Answer: 12 — The closo-borane B₁₂H₁₂²⁻ is an icosahedron with 12 vertices, 20 faces and 30 edges.