P7 Radiation Retrieval

What is alpha radiation?

• Helium nucleus

• High speed electron

• High frequency EM radiation

What is beta radiation?

• Helium nucleus

• High speed electron

• High frequency EM radiation

What is gamma radiation?

• Helium nucleus

• High speed electron

• High frequency EM radiation

Which type of radiation is the most ionising?

• Alpha

• Beta

• Gamma

Which type of radiation has the greatest range in air?

• Alpha

• Beta

• Gamma

Which of the following can stop alpha, but not beta or gamma? (choose 2)

• 1-2 cm of air

• Skin

• 50 cm of air

• Thick lead

Which type of radiation does NOT cause a change to the structure of the nucleus when it is emitted?

• Alpha

• Beta

• Gamma

Which type of radiation causes the atomic number to drop by 2 and the mass number to drop by 4 in the emitting nucleus?

• Alpha

• Beta

• Gamma

Which type of radiation causes the atomic number to increase by 1 and the mass number to remain the same?

• Alpha

• Beta

• Gamma

What does 'activity' mean when applied to a radioactive source? (choose 2)

• The rate at which a source of unstable nuclei decays

• The number of decays per second

• The energy per nucleus for the source

• The internal energy of the source