Improve from 2s and 3s to 6s and 7s.
IB Physics Topic 7.3
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Table of Contents
0:00 Introduction
0:07 Matter Particles, Quarks and Leptons
1:02 Types of Quarks
2:10 Common Baryons (neutrons and protons)
4:26 Types of Lepton
5:40 Anti-particles
7:16 Annihilation
8:06 Anti-matter in Science fiction
10:05 Summary

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