WorksheetsRadioactive decay
Total questions: 9
Worksheet time: 5mins
Gamma radiation can be significantly reduced by...
Paper
Aluminum
Lead
What form of radiation is emitted by nuclei with too many neutrons?
Alpha
Gamma
Beta
Gamma radiation is...
An electromagnetic wave
A helium nucleus
An electron
Which form of radiation has the highest ionising power?
Gamma
Alpha
Beta
What causes an atom's nucleus to become unstable?
Too many or too few neutrons in the nucleus
More electrons than protons
Fewer electrons than protons
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?
Beta
Gamma
Alpha
What fraction of a radioisotope has decayed after two half-lives?
One quarter
All of it
Three quarters
