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Q 1/9
Score 0
What does it mean to say that a substance is radioactive?
60
Each atom in the substance has too many electrons; these electrons can escape.
The substance will emit X-rays when heated.
It contains unstable nuclei that become stable by emitting radiation.
The nuclei of atoms in the substance will split up, giving out neutrons and energy.
Q 2/9
Score 0
Which type of radiation is the most ionising?
60
Electromagnetic radiation
Gamma radiation
Alpha radiation
Beta radiation
9 questions
Q.
What does it mean to say that a substance is radioactive?
1
60 sec
6.4.2.1
Q.
Which type of radiation is the most ionising?
2
60 sec
6.4.2.1
Q.
Choose the sentence that describes isotopes.
3
60 sec
6.4.1.2
Q.
How does a nuclear fission chain reaction continue?
4
60 sec
6.4.2.1
Q.
Which type of radiation is stopped by paper?
5
60 sec
6.4.2.3
Q.
In a uranium-powered nuclear reactor, what is the name for the part that slows down the fission neutrons?
6
60 sec
6.4.2.1
Q.
What is the difference between radioactive contamination and irradiation of a material?
7
60 sec
6.4.2.4
Q.
In Rutherford’s experiment, investigating the scattering of alpha particles from very thin gold foil, Geiger and Marsden observed that a few alpha particles were scattered by more than 90°. What conclusion could they make from this observation?
8
60 sec
6.4.1.3
Q.
A wooden axe handle is carbon-dated by an archaeologist and found to be 8400 years old. The half-life of the radioactive carbon is 5600 years. What percentage of the initial activity did the archaeologist measure from the wood sample?
