Molecular shapes

Question 1

State the properties (angle + name) of a molecule with 2 bond angles and 0 lone pairs

Answer 1

Linear, 180 degrees

Question 2

State the properties (angle + name) of a molecule with 2 bond angles and 1 lone pair

Answer 2

Bent, 104.5 degrees

Question 3

State the properties (angle + name) of a molecule with 2 bond angles and 2 lone pairs

Answer 3

Bent, >120 degrees

Question 4

State the properties (angle + name) of a molecule with 3 bond angles and 0 lone pairs

Answer 4

Trigonal planar, 120 degrees

Question 5

State the properties (angle + name) of a molecule with 3 bond angles and 1 lone pair

Answer 5

Trigonal pyramidal, 107 degrees

Question 6

State the properties (angle + name) of a molecule with 4 bond angles and 0 lone pairs

Answer 6

Tetrahederal, 109.5 degrees

Question 7

State the properties (angle + name) of a molecule with 4 bond angles and 2 lone pairs

Answer 7

Square pyramidal, 90 degrees

Question 8

State the properties (angle + name) of a molecule with 5 bond angles and 0 lone pairs

Answer 8

Trigonal bi-pyramidal, 90 degrees and 120 degrees

Question 9

State the properties (angle + name) of a molecule with 6 bond angles and 0 lone pairs

Answer 9

Octahederal, 90 degrees

Question 10

Explain the lone-pair effect

Answer 10

Unpaired electrons push paired electrons closer, allowing lone pairs to occupy more space.

Question 11

Put these in order of weakest to strongest:
> Bond pair - Lone pair

> Lone pair - Lone pair

> Bond pair - Bond pair

Answer 11

> Bond pair - Bond pair

> Bond pair - Lone pair

> Lone pair - Lone pair