bond angles

• 2 electrons and no lone pairs

  linear and 180°
• 3 electrons and no lone pairs

  trigonal planar and 120°
• 3 electrons and 1 lone pair

  non linear and 119°
• 4 electrons and no lone pairs

  tetrahedral and 109.5°
• 4 electrons and 1 lone pair

  trigonal planar and 107°
• 4 electrons and 2 lone pairs

  non linear and 104.5°
• 6 electrons and no lone pairs

  octahedral and 90°
• Order the angles from biggest to smallest (lone pair/lone pair, lone pair/bonding pair, bonding pair/bonding pair)

  - lone pair/lone pair angles is the biggest

  - lone pair/bonding pair angles are the second biggest

  - bonding pair/bonding pair bond angles are the smallest
• methane CH4

  4 bonding pairs/ no lone pairs and 109.5°
• Ammonia NH3

  3 bonding pairs/ 1 lone pair and 107.5°
• Water H2o

  2 bonding pairs/ 2 lone pairs and 104.5°
• CO2

  4 bonding pairs/ no lone pairs and 180°
• NH4+

  4 bonding pairs/ no lone pairs and 109.5°
• H2O

  2 bonding pairs/ 2 lone pairs and 104.5°
• PCl5

  5 bonding pairs/ no lone pairs and 120°/90°
• ClF3

  3 bonding pairs/ 2 lone pairs and 87.5°
• BCl3

  3 bonding pairs/ no lone pairs and 120°
• SO2

  2 bonding pairs/ 1 lone pair and 120°
• SF6

  6 bonding pairs/ no lone pairs and 90°