Gamma radiation can be significantly reduced by?
Paper
Aluminium
Lead
What form of radiation is emitted by nuclei with too many neutrons?
Alpha
Gamma
Beta
Radioactive powder being spilled onto clothing is an example of?
Contamination
Irradiation
Penetration
What would not be a sensible safety precaution when using radioactive sources?
Using tweezers to handle the sources
Swallowing the sources
Keeping the sources in lead-lined pots when not in use
What is a gamma knife used for?
Cutting gamma rays
Targeting cancerous tumours to destroy them
Instead of using a scalpel during operations
What is the activity of a source that emits 1,200 particles per minute?
1,200 Bq
20 Bq
72,000 Bq
Uranium 238 emits an alpha particle to become what nucleus?
Thorium-234
Thorium-239
Thorium-236
An alpha particle is …..
An electron
A helium nucleus
An electromagnetic wave
Which type of radiation can reach the furthest?
What fraction of a radioisotope has decayed after two half-lives? - Higher
One quarter
All of it
Three quarters