What counts as fundamental?
What counts as fundamental?
In this topic, quarks and leptons are treated as fundamental particles because they are not made from smaller parts in the model. Protons and neutrons are still important, but they are hadrons built from quarks.
Step-by-step lessons on OCR A A Level Physics Fundamental particles. Each one builds up to exam-style questions. Physics is one of the most mathematically demanding A Levels -- at least 40% of the marks across the three papers require maths skills at Level 2 (GCSE) standard or above, so build calculation and graph-handling fluency alongside the conceptual content from the start.