CHEMISTRY – Unit 1 - Revision Science
Centre
Number
Surname
Candidate
Number
0
Other Names
GCSE ¨C NEW
3410U10-1
S18-3410U10-1
CHEMISTRY ¨C Unit 1:
Chemical Substances, Reactions and
Essential Resources
FOUNDATION TIER
WEDNESDAY, 13 JUNE 2018 ¨C MORNING
For Examiner¡¯s use only
Question
Maximum
Mark
1.
9
2.
6
3.
7
4.
8
5.
10
6.
9
7.
5
INSTRUCTIONS TO CANDIDATES
8.
6
Use black ink or black ball-point pen. Do not use gel pen
or correction fluid.
Write your name, centre number and candidate number
in the spaces at the top of this page.
Answer all questions.
Write your answers in the spaces provided in this booklet.
If you run out of space, use the additional page at the back
of the booklet, taking care to number the question(s) correctly.
9.
6
10.
9
11.
5
Total
80
ADDITIONAL MATERIALS
In addition to this examination paper
you will need a calculator and a ruler.
Mark
Awarded
3 41 0 U 1 0 1
01
1 hour 45 minutes
INFORMATION FOR CANDIDATES
The number of marks is given in brackets at the end of each question or part-question.
Question 8 is a quality of extended response (QER) question where your writing skills will be
assessed.
The Periodic Table is printed on the back cover of this paper and the formulae for some common
ions on the inside of the back cover.
JUN183410U10101
? WJEC CBAC Ltd.
MK*(S18-3410U10-1)
2
Examiner
only
Answer all questions.
1.
(a)
The following diagram shows the structure of an atom.
X
Y
electrons
protons
shells
neutrons
nucleus
Complete the following sentences using words from the box.
The particles labelled X are called
............................................................
[3]
.
The part of the atom labelled Y is called the . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
It contains particles called . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(b)
Draw a line from each particle to the charge of that particle.
proton
0
neutron
+1
electron
?1
02
? WJEC CBAC Ltd.
(3410U10-1)
[2]
3
(c)
Examiner
only
The diagrams below show five different atoms labelled A-E.
These letters are not the chemical symbols for the elements.
A
B
E
3 41 0 U 1 0 1
03
D
C
Use the letters A-E to complete the following sentences.
(i)
The atoms found in Group 5 are
(ii)
The atom with an atomic number of 7 is . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
[1]
(iii)
The atom that is an inert gas is
[1]
(iv)
The atoms found in Period 2 are . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and
...........................................
...........................................
and
...........................................
.
.
...........................................
.
[1]
[1]
9
03
? WJEC CBAC Ltd.
(3410U10-1)
Turn over.
4
2.
A food company was accused of using a banned substance in its sweets. Scientists tested four
dyes, A-D, to find out if this was true or not. The results are shown below.
7
solvent
front
6
5
4
ruler
3
2
1
start
line
0 cm
A
(a)
B
C
D
banned
substance
Name the method used.
[1]
.....................................................................................................................
(b)
Dye B was found to have an Rf value of 0.428.
(i)
Use the following equation to calculate the distance moved by dye B.
[2]
distance moved by dye B = Rf ¡Á distance moved by solvent front
Distance moved = . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . cm
(ii)
04
Complete the diagram above to show the position of dye B.
? WJEC CBAC Ltd.
(3410U10-1)
[1]
Examiner
only
5
Identify which dye, A-D, contains the banned substance. Give a reason for your answer.
[2]
Dye . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(c)
Examiner
only
Reason
3 41 0 U 1 0 1
05
6
05
? WJEC CBAC Ltd.
(3410U10-1)
Turn over.
................
................
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