RAdioactivity1

Gamma radiation can be significantly reduced by...
A
A sheet of paper
B
A 3 mm thickness of aluminium
C
Several cm of lead
D
None of the answers
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Slide 1: Quiz
NatuurkundeMiddelbare schoolhavoLeerjaar 3

This lesson contains 24 slides, with interactive quizzes.

time-iconLesson duration is: 30 min

Items in this lesson

Gamma radiation can be significantly reduced by...
A
A sheet of paper
B
A 3 mm thickness of aluminium
C
Several cm of lead
D
None of the answers

Slide 1 - Quiz


A
86.4
B
48.6
C
8
D
104.34

Slide 2 - Quiz

Which type of decay involves the emission of an alpha particle?
A
Beta decay
B
Neutron decay
C
Alpha decay
D
Gamma decay

Slide 3 - Quiz

In a sample, if the half-life of a radioactive isotope is 10 years, how much of the original material will be left after 30 years?
A
1/2
B
1/8
C
1/4
D
1/3

Slide 4 - Quiz


A
245
B
874
C
464
D
1042

Slide 5 - Quiz

Which of the following is not a factor affecting half-life?
A
Nature of the substance
B
Presence of catalysts
C
Pressure
D
Temperature

Slide 6 - Quiz

What is the definition of half-life?
A
The time taken for an element to transform into another.
B
The time taken for a substance to decompose completely.
C
The time taken for the radioactivity of a specified isotope to fall to half its original value.
D
The time taken for a chemical reaction to occur.

Slide 7 - Quiz

Gamma radiation is...
A
A helium nucleus
B
An electron
C
An electromagnetic wave
D
None of the answers

Slide 8 - Quiz

Which form of radiation has the highest ionising power?
A
Gamma
B
Beta
C
Alpha
D
Beta and Gamma

Slide 9 - Quiz

What causes an atom's nucleus to become unstable?
A
Too many or too few neutrons in the nucleus
B
More electrons than protons
C
Fewer electrons than protons
D
Fewer protons

Slide 10 - Quiz

What is the activity of a source that emits 1,200 particles per minute?
A
20 Bq
B
1200 Bq
C
72,000 Bq
D
720,00 Bq

Slide 11 - Quiz

Which type of radiation has the greatest range in air?
A
Alpha
B
Beta
C
Gamma
D
Alpha and Beta

Slide 12 - Quiz

What is the half-life of a radioactive source?
A
Half the age of the source
B
The time taken for the activity of the source to fall to half the original activity
C
Half the time taken for the activity of the source to fall to zero
D
All the answers are correct

Slide 13 - Quiz

A radioactive source has an activity of 3600 Bq and a half-life of 14 days. What is the activity of the source 42 days later?
A
450 Bq
B
900 Bq
C
1200 Bq
D
1800Bq

Slide 14 - Quiz

Calculate the frequency of infrared radiation with a wavelength of 0,01 cm

Slide 15 - Open question

Use the graph to calculate the half life of a sample.

Slide 16 - Open question

A radioactive sample has a count rate of 10,000 Bq. 24 days later the activity has fallen to 625 Bq. What is the half-life of the sample?
A
4 days
B
6 days
C
12 days
D
8 days

Slide 17 - Quiz

Wright the decay equation for:
a Plutonium -242(Pu-242)
b Carbon-14 (C-14)

Slide 18 - Open question

What is the atomic number of an element.

Slide 19 - Open question

What is the smallest unit of an element?
A
Compound
B
Molecule
C
Cell
D
Atom

Slide 20 - Quiz

Who proposed the plum pudding model of the atom?
A
Niels Bohr
B
Ernest Rutherford
C
J.J. Thomson
D
John Dalton

Slide 21 - Quiz

What is the charge of a proton?
A
+1
B
-1
C
0
D
+2

Slide 22 - Quiz

Which subatomic particle has a negative charge?
A
Positron
B
Electron
C
Neutron
D
Proton

Slide 23 - Quiz

What is the atomic number of an element?
A
Atomic mass
B
Number of protons
C
Total number of particles
D
Number of neutrons

Slide 24 - Quiz