Fill the blanks from the particle tray. The ledger totals charge, baryon number and both lepton numbers on each side as you go. Balance it, name the interaction, then see the exchange particle. Equations underlined in red have a diagram to build beside the equation; the AQA diagrams row holds the ones AQA asks students to draw.
| Quantity | Left | Right | Balanced? |
|---|
Read diagrams from bottom (before) to top (after). Charge must balance at every vertex, including the exchange particle. Diagrams flagged “beyond AQA” are simplified sketches for understanding; AQA asks students to draw only the four weak processes and simple photon and pion exchanges. In the meson wheel, strangeness runs down the rows and charge along the diagonals.
Built with Claude, by Anthropic.