BRAINCAKEAntiparticles
Every particle has a corresponding antiparticle. An antiparticle has the same mass (rest mass) as its particle but the opposite charge. If a particle is neutral, its antiparticle is also neutral.
Examples:
• electron e− and positron e+: the positron has the same mass as the electron but a charge of +e.
• proton p and antiproton p̄: the antiproton has a charge of −e.
• neutron n and antineutron n̄: both have zero charge.
• neutrino ν and antineutrino ν̄: both have zero charge and almost zero mass.
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More in Fundamental Particles
- Fundamental Particles
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- The Strong Nuclear Force
- Quarks and Antiquarks
- Quark Composition of Protons and Neutrons
- Baryons and Mesons
- Beta-Minus Decay and Quarks
- Beta-Plus Decay and Quarks
All 11 lessons in Fundamental Particles · All OCR A-level Physics topics