Shapes Of Molecules And Ions

Question 1

What shape and bond angle is a molecule with three pairs of electrons?

Answer 1

Trigonal planar, 120 degrees

Question 2

What is the shape and bonding angle of a molecule with four bonding pairs?

Answer 2

Tetrahedral, 109.5 degrees

Question 3

Does ionic charge affect structure?

Answer 3

No

Question 4

What is the shape and bonding angle of a molecule with five bonding pairs?

Answer 4

Trigonal bipiramid, 90 and 120 degrees

Question 5

What is the shape and bond angle of a molecule with six bonding pairs?

Answer 5

Octahedral, 90 degrees

Question 6

By how much does a lone pair change bonding angles?

Answer 6

Approximately 2.5 degrees per lone pair

Question 7

Repulsion series?

Answer 7

lp - lp > lp - bp > bp - bp

Question 8

Why are lone pairs more repulsive?

Answer 8

Lone pairs are only attracted to the centre nucleus, whereas bonding pairs are attracted to both the centre nucleus and the nucleus of the element which they are also orbiting. This means that the lone pair will be closer to the centre nucleus pushing the others out of the way as they are repelled.

Question 9

Chlorine tetrafluoride ion shape?

Answer 9

Square planar

Question 10

What is the shape and bond angle of a molecule with two election pairs?

Answer 10

Linear, 180 degrees

Question 11

What is the shape and bond angle of a molecule that is based on tetrahedral structure but has a lone pair?

Answer 11

Triangular pyramid - 107 degrees

Question 12

What is the shape and bond angle of a molecule which is based on a tetrahedral structure but has two lone pairs?

Answer 12

V-shaped/angular - 104.5 degrees

Question 13

Example of a triangular pyramid molecule?

Answer 13

Ammonia, NH3

Question 14

Example of an angular/v-shaped molecule?

Answer 14

Water, H2O or H2S or anything with a similar structure