GCSE Radioactivity

GCSE Radioactivity compiled questions

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Engineer Faiz ul Hasnain
Physics, Mathematics O A levels
& career advice.
Radioactivity 1 [email protected]
03215307475
Name & Set
(a) What is an atom?
______________________________________________________________________________
___________________________________________________________________________ [2]
(b) How can we distinguish one element from another?
___________________________________________________________________________ [1]
(c) Name three different elements.
(i) An element that is classed as a metal. _______________________________________ [1]
(ii) An element that is classed as a non-metal. ___________________________________ [1]
(iii) an element that is a gas under normal conditions _____________________________ [1]
(d) What does the word ISOTOPE mean?
______________________________________________________________________________
___________________________________________________________________________ [2]
(e) How many isotopes does hydrogen have? ______________________________________ [1]
(f) Name the isotope of hydrogen with the most number of neutrons. ___________________ [1]
(g) Name an isotope of hydrogen with no neutrons __________________________________ [1]
(h) What do the following symbols stand for?
Symbol Name
(i) X [1]
(ii) Z [1]
(iii) A [1]
234
(i)An isotope of palladium is written 91 Pa
(i) How many protons does it have __________________________________________ [1]
(ii) How many neutrons does it have _________________________________________ [1]
(iii) How many electrons does it have ________________________________________ [1]
1

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Draw a labelled diagram in the space below to show the structure of each nucleus. The first
one has been started for you.…read more

Page 3

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Identify the particle emitted in the following decays:
226
88
Ra Rn + ?
?
?
[1]
1
3
H He + ?
3
2
[1]
238
92
U Th + ?
234
90
[1]
14
6
C N + ?
14
7
[1]
(u) What does `count rate' mean?
___________________________________________________________________________ [1]
3…read more

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Vocabulary
Find the definitions of the following terms used in nuclear physics.…read more

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Engineer Faiz ul Hasnain
Physics, Mathematics O A levels
Radioactivity 2 & career advice.
[email protected]
03215307475
Name & Set
1 An atom can be represented by 226
88 Ra
(i) What information about the nucleus do the numbers 226 and 88 give?
______________________________________________________________________________
___________________________________________________________________________ [2]
(ii) What further information about the nucleus can be obtained from these numbers?
___________________________________________________________________________ [1]
(iii) The radium is thought to be radioactive emitting only alpha-particles and gamma-rays.…read more

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Alpha particles, beta particles, gamma radiation and X-rays are all said to be ionising
radiation. What does this mean?
______________________________________________________________________________
______________________________________________________________________________
___________________________________________________________________________ [2]
(b) Describe two methods by which the presence of ionising radiation may be detected. In each
case describe the principle on which the method works.…read more

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Engineer Faiz ul Hasnain
Physics, Mathematics O A levels
Radioactivity 3 & career advice.
[email protected]
Half-life
03215307475
Name & Set
220
1 In an experiment to determine the half-life of Radon-220 ( 86
Rn ) the following results were
obtained, after allowing for the background count.…read more

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Explain what is meant by the terms
(i) half-life ____________________________________________________________________
___________________________________________________________________________ [2]
(i) background radiation _________________________________________________________
___________________________________________________________________________ [2]
(b) The count rate from an artificially produced radioactive element is measured daily at midday.
The results are given in the table below.…read more

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A medical physicist uses iodine-123 as a tracer in diagnosis of thyroid problems.
Decay curve for Iodine 123
800
Count rate (counts per minute)
700
600
500
400
300
200
100
0
0 10 20 30 40 50 60
Time (hours)
(a) (i) Using the graph, write down the half-life of iodine-123. _________________________ [1]
(ii) What is the count rate after 24 hours? _________________________________________ [1]
(b) (i) If 0.…read more

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An archaeologist finds human bones in the ground and sends them for carbon-dating.…read more

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