C2 – Structure and Bonding – 1-4 Booster Pack
Q1.This question is about substances containing carbon atoms.
(a)Diamond is made of carbon atoms.
(i)Diamond is used for tips of drills.
Figure 1 shows a drill.
© Kershawj/iStock
Give one reason why diamond is used for tips of drills.
......
......
(1)
(ii)Diamond nanoparticles can be made.
Use the correct answer from the box to complete the sentence.
hundred / million / thousandNanoparticles contain a few ...... atoms.
(1)
(b)Graphite is made of carbon atoms.
Figure 2 shows the structure of graphite.
(i)What type of bonding does graphite have?
Tick (✔) one box.Covalent /
Ionic /
Metallic /
(1)
(ii)How many carbon atoms does each carbon atom bond to in graphite?
Tick (✔) one box.1 /
2 /
3 /
4 /
(1)
(iii)What is a property of graphite?
Tick (✔) one box.Dissolves in water /
Has a low melting point /
Soft and slippery /
(1)
(c)Poly(ethene) is made of carbon and hydrogen atoms.
Poly(ethene) is a thermosoftening polymer.
Figure 3 shows the structure of a thermosoftening polymer.
(i)Complete the sentence.
Between the polymer chains in a thermosoftening polymer there
are no ......
(1)
(ii)Use the correct answer from the box to complete the sentence.
condense / dissolve / meltHeating would cause a thermosoftening polymer to
......
(1)
(iii)Many ethene molecules react together to make poly(ethene).
Different types of poly(ethene) can be made by changing the conditions for the reaction.
Suggest two conditions that could be changed.
1 ......
2 ......
(2)
(d)Figure 4 shows how the atoms are bonded in methane.
(i)What is the formula for methane?
Tick (✔) one box.C4H /
CH4 /
C4H4 /
(1)
(ii)Methane has a low boiling point.
What does methane consist of?
Tick (✔) one box.Charged ions /
A giant lattice /
Small molecules /
(1)
(Total 11 marks)
Q2.Iron is extracted from iron oxide in the blast furnace.
(a) The equation for one of the reactions in the blast furnace is:
Fe2O3+3CO2Fe + 3CO2
(i)Complete the word equation for this reaction.
iron oxide / + / carbon monoxide / ...... +......(2)
(ii)Oxygen is removed from iron oxide in the blast furnace.
Draw a ring around the correct answer to complete the sentence.
The iron oxide is / neutralised.oxidised.
reduced.
(1)
(b) The diagrams represent pure iron and iron from the blast furnace.
Pure iron Iron from the blast furnace
(i)Draw one line from each statement to the correct explanation.
(2)
(ii)Explain why iron from the blast furnace is harder than pure iron.
Use the diagrams on page 4 to help you.
......
......
......
......
(2)
(Total 7 marks)
Q3.The diagram shows a small part of the structure of silicon dioxide.
(a) Use the diagram above to answer the question.
Draw a ring around the correct answer to complete each sentence.
twoIn silicon dioxide, each silicon atom is bonded with / three / oxygen atoms.
four
ionic.
The bonds in silicon dioxide are / covalent.
metallic.
(2)
(b)
©Oleksiy Mark/iStock
Silicon dioxide is used as the inside layer of furnaces.
Suggest why.
......
......
(1)
(c) Nanowires can be made from silicon dioxide.
Draw a ring around the correct answer to complete the sentence.
brittle.The word ‘nano’ means the wires are very / thick.
thin.
(1)
(Total 4 marks)
Q4.This question is about lithium and sodium.
(a) Use the Chemistry Data Sheet to help you to answer this question.
In which group of the periodic table are lithium and sodium? Group
(1)
(b) A lithium atom can be represented as
The diagram represents the lithium atom.
(i)Some particles in the nucleus have a positive charge.
What is the name of these particles? ......
(1)
(ii)Some particles in the nucleus have no charge.
What is the name of these particles? ......
(1)
(iii)Use the correct answer from the box to complete the sentence.
3 / 4 / 7The mass number of this atom of lithium is
(1)
(c) Sodium reacts with chlorine to produce sodium chloride.
sodium + chlorine sodium chloride
The diagram shows how the reaction happens.
Only the outer electrons are shown.
Draw a ring around the correct answer to complete each sentence.
(i)
gainingA sodium atom changes into a sodium ion by / losing / an electron.
sharing
(1)
(ii)
a negativeA sodium ion has / no / charge.
a positive
(1)
(iii)
covalentThe ions in sodium chloride are held together by strong / electrostatic / forces.
magnetic
(1)
(d) Sodium chloride is an ionic compound.
Tick () two properties of ionic compounds.
Property / Tick ()Do not dissolve in water
High melting points
Low boiling points
Strong bonds
(2)
(e)(i)The formula of sodium chloride is NaCl
Calculate the relative formula mass of sodium chloride.
Relative atomic masses: Na = 23; Cl = 35.5
......
......
Relative formula mass = ......
(1)
(ii)Draw a ring around the correct answer to complete each sentence.
ionThe relative formula mass of a substance, in grams, is one / isotope / of the substance.
mole
(1)
(f) Nanoparticles of sodium chloride (salt) are used to flavour crisps.
What are nanoparticles?
......
......
(1)
(Total 12 marks)
M1.(a)(i)hard
ignore strong
1
(ii)hundred
1
(b)(i)Covalent
1
(ii)3
1
(iii)Soft and slippery
1
(c)(i)cross-links
allow bonds
ignore links
do not accept intermolecular
1
(ii)melt
1
(iii)any two from:
•temperature
allow heat(ing)
•pressure
•catalyst
2
(d)(i)CH4
1
(ii)Small molecules
1
[11]
M2.(a)(i)iron
either order
1
carbon dioxide
1
(ii) reduced
1
(b) (i)StatemantExplanation
each correct line gains 1 mark
extra lines from statement negate the mark
max. 2
(ii)the layers / rows are distorted / disrupted or it doesn’t occur in layers or the atoms are different
1
so cannot slide over one another orslide less easily
1
[7]
M3.(a)four
1
covalent
1
(b) because it has a high melting point
accept it won’t melt
accept it won’t decompose or react
allow withstand high temperatures
ignore boiling point
1
(c) thin
1
[4]
M4.(a)1 / one
1
(b) (i)protons
1
(ii)neutrons
1
(iii)7
1
(c) (i)losing
1
(ii)a positive
1
(iii)electrostatic
1
(d) high melting points
1
strong bonds
1
(e) (i)58.5
1
(ii)mole
1
(f) very small (particles) or
ignore tiny / small / smaller / microscopic etc.
1-100nm in size or
(particle with a) few hundred atoms
1
[12]
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