C2 Bonding

Question 1

Which electrons are used in bonding?

Answer 1

Outer electrons

Question 2

Group 1 metals react with what to form an ionic compound?

Answer 2

Non-metal

Question 3

What group in the periodic table has the same electronic configuration as ions?

Answer 3

0 Noble Gases

Question 4

Describe how a calcium ion is formed.

Answer 4

Loses 2 outer electrons

Question 5

What is the charge on a potassium ion?

Answer 5

+1

Question 6

How is a chloride ion formed?

Answer 6

Gains 1 outer shell electron

Question 7

What do group 7 elements react with to form an ionic compound?

Answer 7

Metals

Question 8

What is the charge on an oxide ion?

Answer 8

O^2-

Question 9

What is an ion?

Answer 9

A charged particle

Question 10

What is an ionic compound?

Answer 10

Metal & Non-metal chemically bonded

Question 11

What charge will group 1 elements form?

Answer 11

+1

Question 12

What charge will the halogens form?

Answer 12

-1

Question 13

What is ionic bonding?

Answer 13

Electrostatic attraction between ion formed by the transfer of electrons

Question 14

Ionic compounds have what type of boiling and melting points? Why?

Answer 14

High, because they are lattice structure so ionic bonds would have to be broken

Question 15

When melted or dissolved in water ionic compounds conduct electricity, why?

Answer 15

Ions are free to move

Question 16

What is the formula of methane?

Answer 16

CH₄

Question 17

What are represented by ?

Answer 17

Shared pair of electrons – covalent bond

Question 18

What type of bonding is found in methane?

Answer 18

Covalent

Question 19

Why do simple molecules evaporate easily?

Answer 19

Weak intermolecular forces don’t need a lot of energy to break

Question 20

What group of elements don’t often bond because they are unreactive?

Answer 20

0 – Noble Gases

Question 21

What type of bonding is found in compounds with metals and non-metals?

Answer 21

Ionic

Question 22

What type of bonding is found in C₂H₆?

Answer 22

Covalent

Question 23

What type of bonding is found in potassium bromide?

Answer 23

Ionic

Question 24

What is the formula of potassium bromide?

Answer 24

KBr

Question 25

Explain in terms of electron transfer how potassium bromide is bonded?

Answer 25

1 outer electron is transferred from potassium to the bromine to form ions which attract

Question 26

Draw a hydrogen molecule.

Answer 26

Question 27

Draw a chlorine molecule

Answer 27

Question 28

Give a dot and cross diagram for water

Answer 28

Question 29

Draw an ammonia molecule

Answer 29

Question 30

Give a dot and cross diagram for methane

Answer 30

Question 31

Draw a hydrogen chloride molecule

Answer 31

Question 32

Give a dot and cross molecule for an oxygen molecule

Answer 32

Question 33

Is methane a simple molecular or giant covalent structure?

Answer 33

Simple Molecular

Question 34

Is diamond a simple molecular or giant covalent structure?

Answer 34

Giant Covalent

Question 35

In covalent compounds what happens to the electrons?

Answer 35

Shared

Question 36

What is a covalent bond?

Answer 36

A pair of shared electrons

Question 37

What is a double covalent bond?

Answer 37

2 pairs of shared electrons

Question 38

Why does methane have low melting and boiling points?

Answer 38

The low melting point is because it only has weak intermolecular forces that need to be broken

Question 39

Why do simple molecular substances not conduct electricity?

Answer 39

There are no free ions or electrons to move

Question 40

What type of bonding is in diamond?

Answer 40

Giant Covalent

Question 41

How many bonds does carbon make in a diamond?

Answer 41

4

Question 42

Why does diamond have a high melting point?

Answer 42

Each carbon atom has 4 strong bonds to other carbons in a giant structure so a lot of energy is needed to break them.

Question 43

Why is diamond hard?

Answer 43

Each carbon has 4 strong bonds in a giant structure

Question 44

In graphite how many bonds does carbon make?

Answer 44

3

Question 45

Why is graphite in pencils soft and slippery?

Answer 45

Layers are held together with weak forces so slide over each other

Question 46

Why does graphite conduct electricity in electrodes?

Answer 46

1 electron from each carbon is free to move

Question 47

Draw a labelled diagram for the bonding in metals

Answer 47

Question 48

What is the name of the bonding in metals?

Answer 48

Metallic

Question 49

Describe the bonding found in metals

Answer 49

Positive ions attracted to a sea of electrons

Question 50

Why do metals conduct electricity?

Answer 50

Delocalised outer electrons can move

Question 51

Why can metals be hammered and bent?

Answer 51

Layers slide over each other

Question 52

What are shape memory alloys?

Answer 52

Alloys that change shape at different temperatures

Question 53

What is the difference between a thermosoftening polymers and a thermosetting polymer?

Answer 53

Thermosoftening can be heated and reshaped but thermosetting would char

Question 54

What size are nanoparticles?

Answer 54

Very small 1-100nm

Question 55

Do nanoparticles have the same properties as the material in bulk?

Answer 55

No because of the large surface area for their volume

Question 56

Give 3 uses or nanoparticles.

Answer 56

Sun protection Socks with silver or tennis balls Catalysts