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Radioactivity Test

Enter the letter for the matching Response
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1.
Alpha decay results in the nucleus losing . . .
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2.
Gamma rays are . . .
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3.
Radioactivity occurs because of . . .
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4.
What did Rutherford's experiment prove?
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5.
The half life of a radioactive substance is . . .
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6.
Radioactive isotopes are used as tracers. What is a tracer?
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7.
Beta particles travel at nearly the speed of light but are mostly absorbed by . . .
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8.
Workers who are at risk from radiation wear a film badge. Why?
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9.
Higher doses of radiation are used to . . .
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10.
When radiation ionises molecules in living cells it can cause damage, including . . .
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11.
The products of nuclear fission are themselves radioactive. This causes problems because . . .
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12.
When sources of radiation are inside the body, which are most dangerous?
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13.
The half life of a substance can also be . . .
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14.
When sources of radiation are outside the body, which types are most dangerous?
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15.
Beta particles are actually . . .
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16.
When an unstable nucleus decays it . . .
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17.
The nucleus which emits radiation is referred to as a parent. What is its decay product called?
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18.
There are three types of radiation emitted by radioactive sources . . .
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19.
The radioisotope potassium-40 can be used to date igneous rocks because . . .
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20.
The absorption of radiation can be used to . . .
A.
Beta and gamma
B.
alpha, beta and gamma.
C.
electrons.
D.
a form of electromagnetic radiation.
E.
2 protons and 2 neutrons
F.
its stable decay product argon is unable to escape from the rock.
G.
A daughter
H.
the time taken for half the number of radioactive atoms in a sample to decay.
I.
a few mm of metal.
J.
changes in the nuclei of atoms.
K.
the time taken for the count rate to halve.
L.
A substance which is introduced into a person or a water supply to monitor the movement of blood or water through the system.
M.
becomes a different nucleus with a different number of protons and neutrons.
N.
cancer.
O.
monitor or control the thickness of materials.
P.
kill cancer cells and harmful micro-organisms.
Q.
Alpha
R.
The nucleus is tiny, very massive and positively charged.
S.
they are hard to dispose of properly.
T.
If the film turns black when developed, they have been exposed to too much radiation.
Type the Response that corresponds to the displayed Statement.
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21.
Nuclear reactors use a process called . . .
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22.
Alpha particles are actually composed of . . .
Type the Response that corresponds to the displayed Comment.
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23.
I don't care about the electrons !!
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24.
because only 1/4 of the original potassium remains.
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25.
Radioactivity is a random process - we cannot predict when a given atom will emit radiation.
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26.
because it is not easily absorbed by the cells and will cause little damage.
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27.
Protons are positively charged. Neutrons have zero charge
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28.
The term 'ionising radiation' is often used.
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29.
They are produced in supernova explosions.
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30.
because they can escape the body and are less likely to be absorbed.

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Created by: J Thomson
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