Please write clearly in block capitals.
Centre
number
Candidate
number
Surname
Forename(s)
Candidate
signatu
re
*JUN217404101*
IB/M/Jun21/ 7404/1
E7
AqACHEMISTRY2021
AS
CHEMISTRY
Paper 1 Inorganic and Physical Chemistry
JUNE 2021
Time allowed: 1 hour 30 minutes
Materials
For this paper you must have:
the Periodic Table/Data Sheet, provided as an insert (enclosed)
a ruler with millimetre measurements
a scientific calculator, which you are expected to use where appropriate.
Instructions
Use black ink or black ball-point pen.
Fill in the boxes at the top of this page.
Answer all questions.
You must answer the questions in the spaces provided. Do not
write outside the box around each page or on blank pages.
If you need extra space for your answer(s), use the lined pages at
the end of this book. Write the question number against your
answer(s).
All working must be shown.
Do all rough work in this book. Cross through any work
you do not want to be marked.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 80.
Advice
You are advised to spend about 65 minutes on Section A and 25 minutes on Section B.
For Examiner’s Use
Question Mark
1
2
3
4
5
6
7
8
9
10
Section
B
TOTAL
2
Do not write
outside the
*02
*
IB/M/
Jun21/7404/1
Section A
Answer all questions in this
section.
box
0 1 This question is about atomic structure.
0 1 . 1 Figure 1 is a model proposed by Rutherford to show the structure of an
atom.
Figure 1
State two features of the current model that are not shown in the Rutherford
model.
[2 marks]
Feature 1 of the current model
Feature 2 of the current model
Do not write
outside the
3
IB/M/
Jun21/7404/1
*03
*
0 . 1 2A sample of tin is analysed in a time of flight mass spectrometer.
The sample is ionised by electron impact to form 1+ ions.
Table 1 shows data about the four peaks in this spectrum.
Table 1
m/z Percentage abundance
11
2
22.41
11
4
11.78
11
7
34.97
12
0
To be determined
Give the symbol, including mass number, of the ion that reaches the
detector first.
box
Calculate the relative atomic mass of tin in this
sample. Give your answer to 1 decimal place.
[4 marks]
Symbol of ion
Relative atomic mass
Do not write 6
outside the
4
IB/M/
Jun21/7404/1
*03
*
Turn over ►
Powered by qwivy(www.qwivy.org)
Version | 2021 |
Category | Exam (elaborations) |
Included files | |
Authors | qwivy.com |
Pages | 31 |
Language | English |
Tags | AS CHEMISTRY Paper 1 JUNE 2021 - Inorganic and Physical Chemistry |
Comments | 0 |
Sales | 0 |
{{ userMessage }}