VSEPR theory

Question 1

Linear

Answer 1

• 3 atoms
• 180° bond angle
• 2 bonding regions
• electronic and molecular geometry is linear

Question 2

Trigonal planar

Answer 2

• 4 atoms
• 3 bonding regions
• 120° bond angle
• electronic and molecular geometry is trigonal planar

Question 3

Tetrahedral

Answer 3

• 5 atoms
• 109,5° bond angle
• 4 bonding regions
• electronic and molecular geometry is tetrahedral

Question 4

Trigonal bipyramidal

Answer 4

• 6 atoms
• 5 bonding regions
• 90° and 120° bond angles
• electronic and molecular geometry is trigonal bipyramidal

Question 5

Octahedral

Answer 5

• 7 atoms
• 6 bonding regions
• 90° bond angles
• electronic and molecular geometry is octahedral

Question 6

H2O

Answer 6

• 2 bonding regions
• 2 non-bonding regions (lone pairs)
• electrons move down
• electronic geometry is tetrahedral and molecular geometry is angular (3 atoms)

Question 7

NH3

Answer 7

• 3 bonding regions + 1 non-bonding regions = 4 (tetrahedral)
• electronic geometry is tetrahedral
• molecular geometry is trigonal pyramidal