Shapes of molecules

Question 1

List the pairs of electrons and bond angles in a linear molecule (E.G. CO₂)

Answer 1

2 bonding pairs
180 degrees

Question 2

Which shape of molecule has 2 bonding pairs and a bond angle of 180 degrees?

Answer 2

Linear (E.G. CO₂)

Question 3

List the pairs of electrons and bond angles in a trigonal planar molecule (E.G.BF₃)

Answer 3

3 bonding pairs
120 degrees

Question 4

Which shape of molecule has 3 bonding pairs and a bond angle of 120 degrees?

Answer 4

Trigonal planar (E.G. BF₃)

Question 5

List the pairs of electrons and bond angles in a tetrahedral molecule (E.G. CH₄)

Answer 5

4 bonding pairs
109.5 degrees

Question 6

Which shape of molecule has 4 bonding pairs and a bond angle of 109.5 degrees?

Answer 6

Tetrahedral (E.G. CH₄)

Question 7

List the pairs of electrons and bond angles in an octahedral molecule (E.G. SF₆)

Answer 7

6 bonding pairs
90 degrees

Question 8

Which shape of molecule has 6 bonding pairs and a bond angle of 90 degrees?

Answer 8

Octahedral (E.G. SF₆)

Question 9

List the pairs of electrons and bond angles in a triangular pyramid molecule (E.G. NH₃)

Answer 9

3 bonding pairs
1 lone pair
107 degrees

Question 10

Which shape of molecule has 3 bonding pairs, 1 lone pair and a bond angle of 107 degrees?

Answer 10

Triangular pyramid (E.G. NH₃)

Question 11

List the pairs of electrons and bond angles in a non-linear molecule (E.G. H₂O)

Answer 11

2 bonding pairs
2 lone pairs
104.5 degrees

Question 12

Which shape of molecule has 2 bonding pairs, 2 lone pairs and a bond angle of 104.5 degrees?

Answer 12

Non-linear (E.G. H₂O)

Question 13

List the pairs of electrons and bond angles in a square planar molecule (E.G. ClF₄⁻)

Answer 13

4 bonding pairs
2 lone pairs
90 degrees

Question 14

Which shape of molecule has 4 bonding pairs, 2 lone pairs and a bond angle of 90 degrees?

Answer 14

Square planar (E.G. ClF₄⁻)

Question 15

List the pairs of electrons and bond angles in a trigonal bipyramidal molecule (E.G. PCl₅)

Answer 15

5 bonding pairs
120 degrees
90 degrees

Question 16

Which shape of molecule has 5 bonding pairs and bond angles of 120 and 90 degrees?

Answer 16

Trigonal bipyramidal (E.G. PCl₅)