Chemistry Revision

Question

Crude oil is a mixture of hydrocarbons.

Answer 1

Compounds that have the same formula but different bonding.

Answer 2

Elements with the same number of protons but different numbers of neutrons.

Answer 3

Compounds containing hydrogen and carbon.

Answer 4

Have low boiling point

Answer 5

light in colour

Answer 6

hard to light

Answer 7

Refinery gases

Answer 8

refinery gases

Answer 9

lubricating oil

Answer 10

Carbon dioxide

Answer 11

Carbon monoxide

Answer 12

carbon monoxide

Answer 13

carbon dioxide

Answer 14

Atoms with the same number of protons but a different number of neutrons

Answer 15

Atoms with the same number of protons but a different number of electrons

Answer 16

Atoms with the same number of neutrons but a different number of protons

Answer 17

Weak electrostatic forces between oppositely charged ions

Answer 18

Weak forces of attraction between the molecules

Answer 19

Strong electrostatic forces between oppositely charged ions

Answer 20

High melting points

Answer 21

Low boiling points

Answer 22

Conduct electricity when molten/dissolved in water

Answer 23

Crystalline solids

Answer 24

A substance which does not conduct electricity when molten or when dissolved in water, but does conduct electricity when solid .

Answer 25

A substance which does not conduct electricity when solid, but does conduct electricity when molten or when dissolved in water.

Answer 26

A substance which only conducts electricity when in gas.

Answer 27

non metals only

Answer 28

metals only

Answer 29

metals and non metals

Answer 30

To attain noble gas structure

Answer 31

To create compounds

Answer 32

To create strong bonds

Answer 33

A strong attraction between the bonding pair of electrons and the nuclei of the atoms in the bond.

Answer 34

A weak attraction between the bonding pair of electrons and the nuclei of the atoms in the bond.

Answer 35

A strong electrostatic force between the bonding pair of electrons and the nuclei of the atoms in the bond.

Answer 36

Low melting point

Answer 37

High boiling point

Answer 38

Usually solids

Answer 39

Usually gases or liquids

Answer 40

very poor conductors of electricity

Answer 41

They have weak bonds between atoms which are easy to overcome.

Answer 42

They have weak forces of attraction between molecules which require little energy to overcome.

Answer 43

It has a low boiling point because it has simple molecular bonds are weak and require little energy to overcome

Answer 44

It has weak forces of attraction between molecules which require little energy to overcome.

Answer 45

It has strong electrostatic forces of attraction between ions.

Answer 46

It has strong bonds between molecules which require little energy to overcome.

Answer 47

It has strong forces of attraction between molecules which require little energy to overcome.

Answer 48

made from only carbon atoms

Answer 49

it is soluble in water

Answer 50

it has a low melting point

Answer 51

each atom forms four strong covalent bonds with its neighbours

Answer 52

it does not conduct electricity in any state

Answer 53

atoms form a rigid 3D structure

Answer 54

it is the softest material in the world

Answer 55

It has many weak covalent bonds.

Answer 56

It has strong forces of attraction between molecules.

Answer 57

It has many strong covalent bonds which need to be broken - this requires huge amounts of energy.

Answer 58

carbon atoms form 3 covalent bonds with other carbon atoms

Answer 59

electrons hold layers together by a strong force

Answer 60

the free electron from each carbon atom is found in gaps between the layers

Answer 61

the layers can slide over each other easily

Answer 62

does not conduct electricity

Answer 63

layers of hexagons

Answer 64

in pencils

Answer 65

soluble in water

Answer 66

giant ionic structure

Answer 67

high melting point

Answer 68

tetrahedral structure

Answer 69

insoluble in water

Answer 70

It is a liquid at room temperature so can help machines to slide.

Answer 71

Its structure consists of layers that slide over one another easily as they are held by a weak force

Answer 72

It contains a special substance which helps to lubricate the machines

Answer 73

It contains delocalised electrons (free electrons) which can move through graphite and carry charge.

Answer 74

It contains metal which is a good conductor of electricity.

Answer 75

It contains allotropes which carry charge from place to place through graphite.

Answer 76

bad conductors of heat and electricity

Answer 77

high melting and boiling points

Answer 78

the chemical bond of two metals, creating a metallic compound

Answer 79

the electrostatic attraction between the positive metal ion and delocalised electrons

Answer 80

the strong force of attraction between two oppositely charged metal ions

Answer 81

2) Smaller

Answer 82

The outer electrons are further from the nucleus and are shielded by the extra full electron shell of negative charge.

Answer 83

There are too many other electrons which are attracted to the positive nucleus.

Answer 84

The outer electrons are shielded by an extra full electron shell of positive charge.

Answer 85

dogs can fly

Answer 86

It is harder to attract an 8th outer electron, so it cannot fill its outer shell, so it cannot form a bond, so it is less reactive.

Answer 87

low melting points

Answer 88

most reactive group

Answer 89

blue compounds

Answer 90

low densities

Answer 91

soluble in water

Answer 92

Floats on the surface, gently fizzing and giving off hydrogen.

Answer 93

It gets so hot it melts itself when it reacts. Fizzes on surface rapidly.

Answer 94

Gets so hot that it lights the hydrogen gas given off. Burns with a lilac flame.

Answer 95

Fluorine is a pale yellow gas

Answer 96

Chlorine is a blue gas

Answer 97

Bromine is a brown/red dense liquid

Answer 98

Iodine is a grey solid

Answer 99

Astatine is a white sold

Answer 100

A metal compound

Answer 101

A metal halide

Answer 102

A metal halogen

Answer 103

Br2 + 2e- → 2Br-

Answer 104

Br2 → 2Br- + 2e-

Answer 105

Br2 - 2e- → 2Br-

Answer 106

Blue litmus paper blue

Answer 107

Blue litmus paper red

Answer 108

Red litmus paper blue

Answer 109

Methyl-benzene is a polar solvent

Answer 110

The HCl does not dissolve properly

Answer 111

Methyl-benzene is a non-polar solvent

Answer 112

Potassium, Sodium, Lithium, Calcium, Magnesium, Aluminium, Silver, Gold, Platinum, Zinc, Iron, Lead, Copper

Answer 113

Potassium, Sodium, Lithium, Calcium, Magnesium, Aluminium, Zinc, Iron, Lead, Copper, Silver, Gold, Platinum

Answer 114

Potassium, Magnesium, Aluminium, Sodium, Lithium, Calcium, Zinc, Iron, Lead, Copper, Platinum, Silver, Gold,

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Chemistry Revision

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