With the wrong number of neutrons, nuclei can fall apart. A nucleus will regain stability by emitting alpha or beta particles and then ‘cool down’ by emitting gamma radiation.
Gamma radiation can be significantly reduced by…
What form of radiation is emitted by nuclei with too many neutrons?
Gamma radiation is...
An electromagnetic wave
A helium nucleus
Which form of radiation has the highest ionising power?
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
What is the activity of a source that emits 1,200 particles per minute?
Uranium 238 emits an alpha particle to become what nucleus?
An alpha particle is…
Which type of radiation can reach the furthest?
What fraction of a radioisotope has decayed after two half-lives? - Higher
All of it