Exam-style mark scheme
Question
Answers
01.1
Contains 1 electron in the outer shell/
energy level.
01.2
+
C2 The
Periodic Table
Extra Information
−
Na and Cl
Mark
1
AO /
Spec ref.
AO1
C1.2.5
1
AO2
C1.2.3
C1.2.5
C1.2.6
01.3
Any one from:



01.4
1
handled with tongs
safety screen
used a small piece of metal.
C1.2.5
Level 3: A full description of the observations and clear explanation
is provided.
5–6
Level 2: The main points of the observations and explanations are
present, but some steps are missing. The explanation may not be in
a completely logical sequence.
3–4
Level 1: Simple statements relating to the observations or
explanation are made but with no logical structure.
1–2
No relevant content.
AO3
AO1
C1.2.5
0
Indicative Content:
Observations:
 both float on water
 both bubble/fizz
 both produce a gas/hydrogen
 both melt to give a silvery ball
 both move quickly on surface of water
 potassium catches fire or potassium burns with a lilac flame.
Explanation:
 potassium more reactive
 as lower down group
 potassium loses electrons more easily
 (as in potassium) outer electron is further away from nucleus
 as more electron shells
 so more shielding in potassium.
This indicative content is not exhaustive, other creditworthy
responses should be awarded marks as appropriate.
© Oxford University Press 2016
www.oxfordsecondary.co.uk/acknowledgements
This resource sheet may have been changed from the original.
1
Exam-style mark scheme
Question
02.1
Answers
C2 The
Periodic Table
Extra Information
iodine
Mark
1
AO /
Spec ref.
AO3
C1.2.6
02.2
iodine
1
AO3
C1.2.6
02.3
Cl2  2KBr → 2KCl  Br2
Allow correct multiples;
2
allow 1 mark for KCl  Br2.
02.4
AO2
C1.2.6
No reaction;
1
AO2
as iodine is less reactive than
bromine;
1
C1.2.1
1
C1.2.6
1
AO2
so cannot displace bromine from
its salt.
03.1
Sensible scales using at least half the
grid for the points;
both axes correctly labelled (relative
atomic mass and boiling point in °C);
all points correct.
03.2
03.3
1
2
As the relative atomic mass (of Group
0 elements) increases the boiling
point increases.
1
Have a complete outer
shell/energy level;
1
therefore have a stable arrangement
of electrons.
04.1
C1.2.4
1
 small square allow
2
1 mark if 4 points correct.
AO3
C1.2.4
AO1
C1.2.4
Allow therefore unreactive.
Hydrogen is the lightest of all the
elements.
1
1
AO3
C1.2.1
C1.2.2
04.2
04.3
Changed order of elements when
arranged by atomic weights/masses;
1
left gaps for undiscovered elements.
1
Level 4: A full, clear logical explanation is provided which compares
both physical and chemical properties of the elements.
4
Level 3: A clear explanation with logical links that compares both
physical and chemical properties of the elements.
3
Level 2: The main content is present, but the explanations may not
be completely logical. May not consider or compare both physical
and chemical properties.
2
© Oxford University Press 2016
www.oxfordsecondary.co.uk/acknowledgements
This resource sheet may have been changed from the original.
AO1×1
AO2×1
C1.2.2
AO1
C1.3.1
C1.3.2
2
Exam-style mark scheme
Question
Answers
C2 The
Periodic Table
Extra Information
Mark
Level 1: Simple statements relating to physical or chemical
properties are made but with no logical structure. May not compare
the properties.
1
No relevant content.
0
AO /
Spec ref.
Indicative Content:
Physical properties:
 copper has a high melting point, sodium has a low melting point
 copper has a high density, sodium has a low density
 copper is hard, sodium is soft.
Chemical properties:
 copper is much less reactive (with water, oxygen) than sodium
 copper forms coloured compounds, sodium forms white
compounds
 copper forms ions with different charges (Cu+ and Cu2+), sodium
forms Na+ ions
 copper is used as a catalyst.
This indicative content is not exhaustive, other creditworthy
responses should be awarded marks as appropriate.
© Oxford University Press 2016
www.oxfordsecondary.co.uk/acknowledgements
This resource sheet may have been changed from the original.
3