Unit 1 Section 3- Bonding

Question 1

How does ion charge affect the strength of an ionic bond?

Answer 1

If the ion has a higher charge the ionic bond will be stronger as it has a stronger electrostatic force

Question 2

How does ion radius affect the strength of an ionic bond?

Answer 2

If the ion has a smaller radius it will have a stronger ionic bond

Question 3

What is the structure of an ionic compound?

Answer 3

Ionic lattice

Question 4

What is the structure of Covalent compounds?

Answer 4

Small- simple molecular Giant- macro molecular

Question 5

What is the structure of metal compounds?

Answer 5

Metallic lattice

Question 6

What affects the melting point of a metal compound?

Answer 6

The strength of the metallic bond

Question 7

What factors affect the strength of a metallic bond?

Answer 7

Ion charge, ion radius and the number of delocalised electrons

Question 8

How do you explain the shape of a molecule?

Answer 8

-State the number of bonding pairs and lone pairs
-State that the electron pairs repel each other
-If there are no lone pairs state that the electron pairs repel equally
-If there is lone pairs state that lone pairs repel more than bonding pairs
-State the shape and bond angle

Question 9

How do you explain the shape of a molecule?

Answer 9

-State the number of bonding pairs and lone pairs
-State that the electron pairs repel each other
-If there are no lone pairs state that the electron pairs repel equally
-If there is lone pairs state that lone pairs repel more than bonding pairs
-State the shape and bond angle

Question 10

How many bonding and lone pairs does linear molecules have?

Answer 10

Bonding- 2 Lone- 0

Question 11

What is the bond angle of a linear molecule?

Answer 11

180°

Question 12

How many bonding and lone pairs does trigonal planar molecules have?

Answer 12

Bonding- 3 Lone- 0

Question 13

What is the bond angle of a trigonal planar molecule?

Answer 13

120°

Question 14

How many bonding and lone pairs does tetrahedral molecules have?

Answer 14

Bonding- 4 Lone- 0

Question 15

What is the bond angle of a tetrahedral molecule?

Answer 15

109.5°

Question 16

How many bonding and lone pairs does trigonal pyramidal molecules have?

Answer 16

Bonding- 3 Lone- 1

Question 17

What is the bond angle of a trigonal pyramidal molecule?

Answer 17

107°

Question 18

How many bonding and lone pairs do bent molecules have?

Answer 18

Bonding- 2 Lone- 2

Question 19

How many bonding and lone pairs do trigonal bipyramidal molecules have?

Answer 19

Bonding- 5 Lone- 0

Question 20

What is the bond angle of a trigonal bipyramidal molecule?

Answer 20

120° and 90°

Question 21

How many bonding and lone pairs do octahedral molecules have?

Answer 21

Bonding- 6 Lone- 0

Question 22

What is the bond angle of an octahedral molecule?

Answer 22

90°

Question 23

How does a dipole-dipole intermolecular force form?

Answer 23

Oppositely charged poles on neighbouring molecules form an electrostatic attraction

Question 24

Which molecules do Hydrogen bonds occur between?

Answer 24

A Hydrogen atom and either a Nitrogen, Oxygen or a Fluorine atom

Question 25

How do van der waals forces occur?

Answer 25

It forms between non polar molecules. Random asymmetry of the electron cloud in an atom forms an instantaneous dipole and the electrons are attracted to the nucleus of a neighbour atom which cause the neighbouring atom to form a induced dipole

Question 26

Why do larger molecules have more van der waals forces?

Answer 26

The molecule will have more electrons so more van der waals bonds can form which will cause it to be more stronger to a smaller non polar molecule and will have a higher melting point

Question 27

Why do some polar molecules have no overall charge?

Answer 27

The symmetry of the molecule will cause the dipoles to cancel out