Question

1. match the molecular shapes with the lewis structures.

options

• trigonal planar
• linear
• tetrahedral
• bent
• trigonal pyramidal

Explanation:

Step1: Analyze CH₄ structure

Carbon has 4 bonding pairs, no lone pairs. Electron domain geometry and molecular geometry are tetrahedral.

Step2: Analyze NH₃ structure

Nitrogen has 3 bonding pairs, 1 lone pair. Electron domain geometry is tetrahedral, molecular geometry is trigonal pyramidal.

Step3: Analyze BCl₃ structure

Boron has 3 bonding pairs, no lone pairs. Electron domain geometry and molecular geometry are trigonal planar.

Step4: Analyze H₂O structure

Oxygen has 2 bonding pairs, 2 lone pairs. Electron domain geometry is tetrahedral, molecular geometry is bent.

Step5: Analyze CO₂ structure

Carbon has 2 bonding pairs (double bonds), no lone pairs. Electron domain geometry and molecular geometry are linear.

Answer:

1. $\text{CH}_4$ — tetrahedral
2. $\text{NH}_3$ — trigonal pyramidal
3. $\text{BCl}_3$ — trigonal planar
4. $\text{H}_2\text{O}$ — bent
5. $\text{CO}_2$ — linear