1. What are protons made of?

Answer (click and hold): 3 quarks, uud

2. What are electrons made of?

Answer (click and hold): Nothing smaller, as far as we know

3. Which of these is made of quarks?

baryons Yes, but what else?
mesons Yes, but what else?
barons Yes, even English nobility are made of quarks.

Go Back to Standard Model Path...