Question

write the lewis structure for the following molecule: hcn.which one of the following is the correct lewis structure for hcn?h - c≡n h - c≡n: :h - c≡n: h - c = n:

Explanation:

Step1: Determine the central atom

Carbon (\(C\)) is the central atom as it can form more bonds than hydrogen (\(H\)) and nitrogen (\(N\)) in this context.

Step2: Calculate the total number of valence electrons

Hydrogen has \(1\) valence electron (\(H:1\)), carbon has \(4\) (\(C:4\)), and nitrogen has \(5\) (\(N:5\)). So total valence electrons \(=1 + 4+5=10\).

Step3: Form bonds and distribute remaining electrons

• \(H\) forms a single bond with \(C\) (uses \(2\) electrons).
• \(C\) forms a triple bond with \(N\) (uses \(6\) electrons).
• Remaining electrons: \(10-(2 + 6)=2\). These \(2\) electrons go to \(N\) as a lone - pair.

Answer:

\(H - C\equiv N:\)