Antimatter (OCR A Level Physics)

Revision Note

Test Yourself
Katie M


Katie M




  • The universe is made up of matter particles (protons, neutrons, electrons etc.)
  • All matter particles have antimatter counterparts
    • Antimatter particles are identical to their matter counterpart but with the opposite charge

  • This means if a particle is positive, its antimatter particle is negative and vice versa
  • Common matter-antimatter pairs are shown in the diagram below:

Matter-Antimatter Table


  • Apart from electrons, the corresponding antiparticle pair has the same name with the prefix ‘anti-’ and a line above the corresponding matter particle symbol
  • A neutral particle, such as a neutron or neutrino, is its own antiparticle

Exam Tip

You must learn each fundamental particle, its symbol, and its corresponding antiparticles and symbols. Don't let the symbols catch you out in diagrams for this unit. 

Properties of Antimatter

  • Although antimatter particles have the opposite charges to their matter counterparts, they still have identical mass and rest mass-energy
    • The rest mass-energy of a particle is the energy equivalent to the mass of the particle at rest

  • The datasheet provides the masses in kg and rest-mass energies in MeV for a proton, neutron, electron and neutrino
  • These masses are identical for their corresponding antiparticles (antiproton, antineutron, positron and antineutrino respectively)

Mass & Rest Mass Energy Table

Properties of Antiparticles_ Mass & Rest Mass Energy Table, downloadable AS & A Level Physics revision notes

You've read 0 of your 0 free revision notes

Get unlimited access

to absolutely everything:

  • Downloadable PDFs
  • Unlimited Revision Notes
  • Topic Questions
  • Past Papers
  • Model Answers
  • Videos (Maths and Science)

Join the 100,000+ Students that ❤️ Save My Exams

the (exam) results speak for themselves:

Did this page help you?

Katie M

Author: Katie M

Katie has always been passionate about the sciences, and completed a degree in Astrophysics at Sheffield University. She decided that she wanted to inspire other young people, so moved to Bristol to complete a PGCE in Secondary Science. She particularly loves creating fun and absorbing materials to help students achieve their exam potential.

Join over 500 thousand students
getting better grades