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Quarks
- They have the spin quantum number of 1/2
- They have Color Charge
- They have fractional electric charges
- They participate in strong interactions
Three generations (+2/3 and -1/3 electric charges respectively)
- Up and Down
- Charm and Strange
- Top and Bottom
and their respective anti-particles. Anti-quarks have the same mass, mean lifetime and spin, but have opposite electric charges and colour charges.
There are 6 distinct types of quarks, and together with their colour charge and anti-quark variants, there are 36 types of quarks.