Atomic structure

• What is an alpha radiation particle made of?

  Two protons and two neutrons
• What is the charge of an alpha radiation particle?

  It has a charge of +2
• What is beta radiation?

  A fast-moving electron with a relative mass of zero
• What material can stop alpha radiation?

  Paper
• What type of radiation is gamma radiation?

  A high energy wave
• How much aluminium is needed to stop beta radiation?

  3mm of aluminium
• What does ionisation refer to in the context of radiation?

  Damage to DNA
• What material is effective in stopping gamma radiation?

  Lead
• How do the ionising abilities of alpha, beta, and gamma radiation compare?

  • Alpha is highly ionising
  • Beta is less ionising
  • Gamma is the least ionising