Question

below is the lewis structure of the hydrogen cyanide (hcn) molecule. h : c ::: n : count the number of bonding pairs and the number of lone pairs around the hydrogen atom in this molecule. bonding pairs: lone pairs:

Explanation:

Step1: Analyze hydrogen - carbon bond

Hydrogen in HCN is bonded to carbon. A single bond consists of 1 bonding pair. So the number of bonding pairs around hydrogen is 1.

Step2: Consider electron - pair configuration of hydrogen

Hydrogen has only 1 valence electron and it uses this electron to form a bond with carbon. So it has 0 lone pairs.

Answer:

bonding pairs: 1
lone pairs: 0