Module 2- Shapes of Molecules

• Linear

  Bond angle= 180°
• Trigonal Planar

  Bond angle= 120°
• Tetrahedral

  Bond angle=109.5°
• Octahedral

  Bond angle= 90°
• Pyramidal

  Bond angle =107°

  3 bonding pairs and 1 lone pair
• Non-linear

  Bond angle=104.5°

  2 bonding pairs and 2 lone pairs
• Electron-Pair Repulsion Theory

  • Negatively charged particles repel each other
  • lone pairs repel more than bonding pairs
  • bonding pairs and lone pairs decide the shape of the molecule